KR100422157B1 - cooperative buying and selling system using computer communication network and operating method thereof - Google Patents

Abstract

The present invention relates to a joint purchase system using a computer communication network and a method of operating the same, the product information and sales information for any product is registered and posted on the web, the purchase request for any product received from any prospective purchaser Interest of prospective buyers in that a number of potential purchasers can purchase the product at different prices within a certain range, which is cheaper than the market price of the relevant product, by determining the selling price of the corresponding product within a certain range. This may cause an advantage of attracting more customers for any product sellers. That is, by increasing the number of buyers and sellers using the joint purchase system according to the present invention, there is an advantage that a higher sales can be obtained than other joint purchase system.

Description

Cooperative buying and selling system using computer communication network and operating method

The present invention relates to a joint purchase system using a computer communication network and a method of operating the same, and in particular, to register the product information and sales information for any product on the web, and to apply for a purchase of any product from a plurality of potential buyers The present invention relates to a joint purchase system using a computer communication network and a method of operating the same so that the sale price of the corresponding product is determined by a lottery within a predetermined range.

With the recent increase in the use of the Internet, various e-commerce using the same have been introduced.

A joint purchase system using a computer communication network is a kind of such electronic commerce, and the joint purchase system may be of two types. In one form, the operator of the joint purchase system acquires a seller who wants to sell a product as a sales member, and then registers the registration information of the product that the seller wants to sell and sales information such as the quantity sold, the selling price, and the selling period. It is a method of recruiting buyers by registering and posting the information on the web. The other is a method in which the operator of the joint purchase system determines the purchase quantity for the corresponding product together with the prospective purchasers who want to purchase a certain product, and secures the seller of the corresponding product.

And the operator of the joint purchase system receives a commission for the sale of goods in this manner.

Such a joint purchase system makes it easy for sellers to secure buyers for the product, and the buyer has the advantage of being able to purchase a desired product at a low price.

Therefore, recently, the number of sites specializing in the joint purchase system is rapidly increasing on the Internet, and in order to contribute to the improvement of the sales of the system by securing more sellers and buyers in the competition with the multiple joint purchase systems, There is a need for novel marketing techniques that are distinct from systems.

The present invention has been made in accordance with the necessity as described above, the first object of the present invention is to register the product information and sales information for any product from the seller of goods and post it on the web, and then purchase the product for a certain period It is to provide a method of operating a joint purchase system using a computer communication network, by recruiting prospective buyers who wish to purchase, and determining the selling price of the product by lottery when the period is over, by applying different selling prices to each prospective buyer. .

The second object of the present invention is to register the product information and sales information for any product from the seller of the product and post it on the web, if any prospective purchaser to apply for the purchase of the product in real time by lottery The present invention provides a method of operating a joint purchase system using a computer communication network.

It is a third object of the present invention to provide a joint purchase system using a computer communication network that allows a product to determine a sale price within a predetermined range by lottery.

1 is a general configuration diagram of a method of operating a joint purchase system using a computer communication network,

2 is a general configuration diagram of a joint purchase system using a computer communication network,

3 is an exemplary diagram for a database for managing a purchasing member of a joint purchase system according to an embodiment of the present invention;

4 is an exemplary diagram for a database for managing a registered product of a joint purchase system according to an embodiment of the present invention;

5 is an exemplary diagram for a database for managing sales registration of a joint purchase system according to an embodiment of the present invention;

6 is an exemplary diagram of a purchase application management database of a joint purchase system according to an embodiment of the present invention;

7 is an exemplary view of a sales status management database of a joint purchase system according to an embodiment of the present invention;

8 is an exemplary diagram of a lottery information management database for each product of the joint purchase system according to an embodiment of the present invention;

9 is an exemplary diagram of a lottery result management database of a joint purchase system according to an embodiment of the present invention;

10 is a flowchart illustrating a method of operating a joint purchase system according to an embodiment of the present invention;

11 is a process flow diagram for a method for recruiting buyers who want to purchase a product posted on the web according to an embodiment of the present invention;

12 is a flowchart illustrating a method of drawing a product sale price according to an embodiment of the present invention;

FIG. 13 is an exemplary diagram for a purchase application number and a lottery management number in which merchandise sales are generated for a lottery according to an embodiment of the present invention; FIG.

14 is a flowchart illustrating a method of confirming payment history for each purchaser according to an embodiment of the present invention;

15 is a flowchart illustrating a method of operating a joint purchase system according to another embodiment of the present invention;

16 is a flowchart illustrating a method of drawing a product sale price according to another embodiment of the present invention;

17 to 21 are exemplary diagrams of screen states for explaining the operation of the joint purchase system according to an embodiment of the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

100: server 110: database

120: Internet 130: Terminal

In order to achieve the first object, a joint purchase system using a computer communication network provided by the present invention receives product information and sales information about a corresponding product from a seller who wants to sell an arbitrary product using a computer communication network and posts it on the web. During the first process and the purchase application period included in the sales information, the purchase application contents of a plurality of prospective purchasers who have paid a predetermined purchase down payment to purchase the posted goods are received, The second process of managing the trading status of each product item in real time, and when the purchase application period expires, based on the sales status information of the product item to set the individual selling price of the products corresponding to the total quantity applied for purchase for each product item A purchase that determines each of the ranges and purchases the product by its respective selling price The third process of designating the prospective person through the lottery, and the payment information for each prospective purchaser is calculated by the management information for each prospective purchaser who separately manages the information about the prospective purchasers, and the result is calculated according to the prospective purchaser and the corresponding seller of the product. It characterized in that it comprises a fourth process of notifying to.

In addition, in order to achieve the second object, the method of operating a joint purchase system using a computer communication network provided by the present invention may obtain product information and sales information about a corresponding product from a seller who wants to sell an arbitrary product using a computer communication network. The first process of registering and posting on the web, and the purchase application of a plurality of prospective purchasers who have paid a predetermined purchase deposit to purchase the posted product, and receive the real-time trading status of each item by the item And a third process of determining a selling price for a product included in the purchase application within a predetermined range by drawing, based on the second process of managing the product and discount information for each item included in the sale information, and the purchase. By prospective purchaser, management information by prospective purchaser who separately manages information about potential buyers And a fourth process of calculating the gold payment information and notifying the prospective purchaser and the seller of the product of the result.

In addition, the joint purchase system using a computer communication network provided by the present invention to achieve the third object includes storage means for storing the operating program; And a processor coupled to the storage means for executing an operation program stored in the storage means, wherein the operation program is a module for posting sales information on a web including sales periods and discount information for any product. ; A module for receiving a purchase request of a plurality of prospective purchasers who have paid a predetermined down payment to purchase the posted product, and determining a reference selling price for the corresponding product based on the total purchase quantity for each product; And a module for determining a selling price for the corresponding product by lot within a preset range based on the reference selling price.

Hereinafter, preferred embodiments of the joint purchase system and its operation method according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a general configuration diagram of a method of operating a joint purchase system using a computer communication network. As shown in FIG. 1, the joint purchase system of the present invention is configured such that the seller 10 and the buyer 20 perform a transaction for any product through the joint purchase system 30. First, the seller 10 registers the sale with the joint purchase system 30 for sale of any goods, and then pays a down payment, the joint purchase system 30 receives the corresponding contents accordingly. The sales information is posted on the web, and prospective buyers for the product are recruited. On the other hand, the buyer 20 sees the sales information posted on the web to register the purchase of the desired product, and pays the down payment accordingly.

Then, the joint purchase system 30 determines the selling price of the product based on the information by lottery, and then transmits the result of the lottery to both the seller 10 and the buyer 20, and confirms the above contents. ) And the buyer 20 perform payment and delivery for the goods based on the general payment method and the product delivery method used in general electronic commerce.

2 shows a general configuration of a joint purchase system using a computer communication network.

Referring to FIG. 2, the joint purchase system of the present invention includes a server 100 on which a processor for executing an operation program of the joint purchase system is mounted, and storage means 110 in which a database is stored. The server 100 executes an operation program of the joint purchase system while referring to or updating various databases stored in the storage means 110.

On the other hand, the database stored in the storage means 110 is a Buyer Member Data Base (BMDB) 111, Registered Goods Data Base (RGDB) 112, sales registration management Selling Registration Database (SRDB) (113), Purchase Offer Data Base (PODB) (114), Buying and Selling Data Base (BSDB) (115), by product And a lottery result management database (LIDB) 116, a lottery result management database (LRDB) 117, and the like.

In addition, the joint purchase system includes a terminal 130 connected to the server 110 through a computer communication network such as the Internet 120, such as a personal computer (PC), a notebook computer, a hand computer, an Internet mobile phone, an Internet TV, and the like. do. In the embodiment of the present invention, an example of a personal computer (PC) is shown.

The terminal 130 may be equipped with a separate program for purchase registration and sales application, such a program is downloaded from the server 100 via the Internet, or from a recording medium such as a distributed CD (Compact Disc) from the terminal ( 130).

Referring to Figure 3, the purchase member management database (BMDB) 111 is ID / password / name (company name) / resident registration number (business registration number) / postal code / address / contact / purchase performance list / bonus points / credit Field, and so on.

The contact field includes a phone number / cell phone / calling number / e-mail address, and the purchase record list field includes a list of purchased products purchased by the corresponding buyer and information on total purchase price accordingly. The bonus point field includes bonus point information of the buyer according to the purchase performance, and the bonus point is operated to be replaced with an electronic money later.

The credit field includes a buyer's credit rating that is set by reflecting the number of cancellations, returns, and purchases after registering the purchase, and is used as management information of the buyer.

Referring to Fig. 4, a registered product management database (RGDB) 112 includes fields such as product registration number / product (model) name / commercial selling price / short description / detailed description / classification.

The brief description field includes information of a product, representative specifications, a brief product introduction, a manufacturing company, etc., and the detailed description field includes a detailed description of the product, a structure, various photos, and product information by the joint purchase system operator. Included.

Referring to FIG. 5, a sales registration management database (SRDB) 113 includes fields such as product registration number / purchase application period / sale quantity / discount information / lottery information / product dispatch information.

The discount information field includes reference discount rate information that is differently applied for each sale quantity of the corresponding product, and information on a change rate of a discount rate that is variable based on the reference discount rate.

The lottery information field includes lottery date information for the corresponding product, and the product dispatch information field includes information about a shipping period for the corresponding product, that is, an average period of arrival to the buyer from the shipment date of the corresponding product.

Referring to FIG. 6, a purchase application management database (PODB) 114 includes fields such as a purchase application number / application date / product registration number / purchaser ID / application quantity / deposit payment information / credit card information / account information. .

The purchase application number field stores numbers sequentially assigned according to the order of the purchase application for the corresponding product.

The down payment information field contains general information about the down payment made by the buyer in accordance with the purchase application. That is, it includes information such as the payment method of the down payment, the amount of payment of the down payment, the date of payment.

The credit card information field is an optional field included when the corresponding buyer wants to pay the sales price with a credit card. The credit card information field includes information such as the type of credit card, the card number, and the expiration date of the purchaser.

The account information field includes the account information of the prospective purchaser who is required to transfer the balance to the buyer according to the difference between the purchase down payment and the selling price.

Referring to FIG. 7, the transaction status management database (BSDB) 115 includes fields such as product registration number / sale quantity / current application quantity / current reference discount rate / lottery information / product dispatch information.

The Current Requested Quantity field contains information about the quantity requested for the current application against the total sales of the product.

The current reference discount rate is based on the discount information included in the sales registration management database (SRDB) 113 and the current application discount rate information based on the current application quantity information included in the current application quantity field. It includes. In this case, the current reference discount rate information included in the field is necessary information when the sales price of the corresponding product is drawn in real time.

Referring to FIG. 8, the lottery information management database (LIDB) 116 for each product includes fields such as a product registration number / total purchase application quantity / final reference discount rate.

The total purchase application quantity field includes information on the total quantity of the product applied for purchase until the time when the purchase application period of the corresponding product expires.

The final reference discount rate field includes current reference discount rate information to be applied when the corresponding product is drawn based on the total quantity information included in the total purchase request quantity field. In this case, the final reference discount information included in the field is required information when the sales price for the product is drawn at the time when the reception is terminated after receiving the purchase application for the corresponding product for a certain period.

9, the lottery result management database (LRDB) 117 includes a purchase application number / product registration number / lottery discount rate / bonus points / final discount rate / final selling price / remaining payment amount / product dispatch information field.

The lottery discount rate field includes average discount rate information corresponding to an average value of a discount rate determined for each product by lottery when the number of products requested for purchase is plural by one purchase application number.

The final discount rate field includes discount rate information determined by applying bonus point information of the corresponding buyer to the average discount rate.

The final selling price field includes selling price information of a product determined by the discount rate information included in the final discount rate field.

The remaining payment amount field includes information on the amount paid or overpaid by the buyer by comparing the down payment information previously paid by the prospective purchaser to purchase the corresponding product with the selling price information included in the final selling price field. .

The goods shipment information includes information on the date of shipment of the goods and information on the place of shipment requested by the buyer.

FIG. 10 is a flowchart illustrating a method of operating a joint purchase system according to an embodiment of the present invention. Referring to FIG. 10, a joint purchase system according to an embodiment of the present invention may use a computer communication network to sell an arbitrary product. Registering the product information and sales information for the product from the seller to sell (s110), and during the purchase application period included in the sales information, to post the sales information for the product on the web to purchase the posted product Recruiting buyers for (s120 to s140). At this time, the prospective purchaser receives a purchase application for purchasing a desired product among the posted contents by a predetermined form provided on the Internet, and pays a predetermined purchase deposit therefor.

Meanwhile, the joint purchase system updates the contents of the trading status management database (BSDB) to manage the trading status of each item by the item of the prospective purchaser in real time.

When the purchase application period registered by the seller expires, the selling price for the corresponding products is determined by the drawing (s150). At this time, the individual sales price of the products corresponding to the total quantity applied for purchase for each product item is determined within the preset range based on the sales quantity and the current standard discount rate described in the trading status management database (BSDB). Lottery will designate a prospective buyer to purchase the product by the sale price.

When the selling price for each product is specified as described above, the payment information for each prospective purchaser is calculated based on the management information for each prospective purchaser included in the purchase member management database (BMDB) and the purchase application management database (PODB). After that, the result is notified to the prospective purchaser and the seller of the product (s160).

In this case, the payment information is calculated by referring to the bonus point information and the purchase down payment payment information of the corresponding purchase candidate for each purchase potential buyer.

Then, when the confirmation message of the seller and the prospective purchaser for the content is transmitted, the procedure for sending and confirming the corresponding goods is performed by the same method as the general electronic commerce method (S170).

FIG. 11 is a flowchart illustrating a more detailed process of the buyer recruitment process s140 in the method according to an embodiment of the present invention. Referring to FIG. 11, the joint purchase system of the present invention is registered from the seller. After posting the product and sales information on the web, it waits until the purchase application information is input from any prospective purchasers (s141 and s142). When the purchase application information is input from any prospective purchaser, a guide message regarding payment of a purchase down payment is displayed to the corresponding purchaser (s143). If the prospective purchaser who confirms the contents pays the purchase down payment of the corresponding amount (s144), the purchase candidate from the prospective purchaser receives the purchase request (s145). Then, the trading status management database (BSDB) is updated based on the products and the purchase quantity information included in the purchase application details to manage the trading status for each item (s146).

12 is a flowchart illustrating a more detailed process of the lottery process s150 in the method according to an embodiment of the present invention. Referring to FIG. 12, first, a purchase of a corresponding product for a predetermined period of time. If the application is terminated, according to the product lottery information management database (LIDB) for each item including the total purchase application quantity and the final reference discount information for the product is generated accordingly (s151).

In addition, an individual lottery management number is generated according to the total purchase application quantity for each product item (s152). In this case, the reason why the individual lottery management number is required separately in addition to the purchase application number automatically assigned at the time of the purchase application is necessary to determine the individual price differently when applying for a plurality of products in one purchase application number.

However, the method for determining the individual price for each commodity can be applied to various methods in addition to the above method, so that the process of generating such individual lottery management number may be omitted as necessary.

In the description with reference to FIG. 12, an example in which an individual price of each product is determined by generating the individual lottery management number will be described.

That is, when the individual lottery management number is generated by the process (s152), the selling price for each product is determined by the individual lottery management number (s153).

Then, the individual lottery management numbers included for each purchase application number are collected to determine the average selling price for each purchase application number, and the final product sale price of the corresponding purchase planner is determined (s154).

13 is a view showing a configuration example of a purchase application management number and an individual lottery management number generated in accordance with an embodiment of the present invention, Figures 13a and 13b is a purchase application number assigned to the prospective purchaser when the purchase application is received, 13C, 13D, 13E, and 13 show a state in which an individual lottery management number is assigned by the quantity information requested for each purchase application number.

Referring to Figure 13, the purchase application number automatically assigned by the joint purchase system of the present invention consists of eight digits, the first six digits (A) represents the purchase application number, the second two digits (B) Configured to indicate quantity information.

That is, in the example of FIG. 13, serial numbers generated by the purchase receipt of the prospective purchaser are '01070300' and '01070400', and only one is applied for the '01070300' purchase request and the '01070400' When three products are requested in a purchase application, the individual lottery management numbers assigned in the joint purchase system of the present invention are '01070301' and '01070401 to 01070403', respectively.

Therefore, in one embodiment of the present invention, after determining the price for each product by the individual lottery management number assigned as described above, the price information for each purchase application is determined by collecting the price information for each product for each purchase application number.

FIG. 14 is a flowchart illustrating a more detailed process of the payment payment history checking process s170 for each purchaser in the method according to an embodiment of the present invention. Referring to FIG. When the average product price for each purchaser is determined by the first purchaser, first, the bonus point of the purchaser is checked (s161), and if there are bonus points, the final product price for which the bonus point is applied to the determined average product sale price is calculated ( s162, s163).

In addition, by comparing the purchase price of the product of the purchase price specified by the prospective purchaser and the purchase amount of the purchaser (s164), if the purchase price of the payment of the specified product is more than the amount of the purchase payment, the corresponding difference is refunded to the prospective purchaser (s167, s168). In addition, when the specified purchase price of the product is less than the amount of the down payment, the prospective purchaser pays the remaining amount through the payment guidance for the remaining amount (s165 and s166).

If the purchase price of the product of the prospective purchaser is normally terminated by the above process, the product shipment and shipment confirmation procedure is performed.

15 is a flowchart illustrating a method of operating a joint purchase system according to another embodiment of the present invention. Referring to FIG. 15, a joint purchase system according to another embodiment of the present invention may be implemented using a computer communication network. Product information and sales information about the product is registered from the seller who wants to sell the product (s210).

Then, after posting the product and sales information on the web (s230), buyers for purchasing the posted product are recruited (s240). That is, the prospective purchaser prepares a purchase application form of a predetermined form provided on the Internet, makes a purchase application for a desired product, and pays a predetermined purchase deposit.

When the buyers are recruited as described above, based on the discount information for each item of the item included in the sale information, the selling price for the product included in the content of the purchase application is determined by drawing within a predetermined range (s250).

In addition, the payment information for each potential purchaser is calculated based on management information for each potential purchaser separately managing the information on potential purchasers, and the result is notified to the potential purchaser and the corresponding seller of the product, and confirmed from the potential purchaser and the seller of the product. When the message is received (s260), according to the goods sending and confirmation procedure is performed (s270).

At this time, the product dispatch and confirmation procedure (s270) uses a general method used in the existing electronic commerce method.

Then, the series of processes s230 to s270 are repeated until the sale period expires (s220).

FIG. 16 is a flowchart illustrating a process of a lottery process s250 according to another embodiment of the present invention. Referring to FIG. 16, in another embodiment of the present invention, whether there is a previous lottery history before performing a lottery process; To determine (s251), if there is a previous lottery history, the product sales price is determined by referring to the lottery history (s252). If not, the product selling price is determined by lottery (s253).

For this purpose, once the lottery is performed, the result of the lottery is managed by a separate database.

Referring to the present invention as described above with more specific examples as follows.

Suppose there are any handbags in the market for 1 million won, and the operator of the joint purchase system concludes a contract for applying a discount rate per quantity sold with the handbag seller as shown in Table 1.

Quantity 1-9 10-19 20-29 Standard discount rate 30% 33% 36%

In other words, the contract is to apply a sliding discount rate of the standard discount rate increases with the increase in the quantity of purchases, and the contracted rate of the discount rate is contracted ± 20% based on the reference discount rate.

Then, when the purchase quantity for the handbag is 9, the applied discount rate varies by ± 20% based on 30%, and as a result, the prospective purchasers by the joint purchase system of the present invention are between 10% and 50%. The handbag can be purchased at a discounted price.

That is, in the case of the handbag, the selling price is determined in the range of 10% discount from 900,000 won to 50% discount from 500,000 won, and at this time, since the quantity of handbags to be provided by the purchase application is 9, Dividing the price difference by (9-1), the difference in sales price applied to each prospective purchaser is 50,000 won.

Therefore, according to this calculation, the individual selling price of the handbag having a market selling price of one million won is allocated to each prospective buyer by lot as shown in Table 2 by the discount rate information.

Purchaser Applicable selling price A 900,000 B 850,000 C 800,000 D 750,000 E 700,000 F 650,000 G 600,000 H 550,000 I 500,000

17 to 21 are exemplary diagrams of screen states for explaining the operation of the joint purchase system according to an embodiment of the present invention, the lottery joint purchase system according to an embodiment of the present invention as shown in Figure 17 The sale product registered from the seller and the sale information thereof are displayed on the screen. At this time, the sales information display form includes image information for each product, and brief information such as a brand name, a current reference selling price, an application deadline, and the current application quantity as shown in FIG. 17.

When a certain prospective purchaser selects a desired product by viewing the contents of the screen, detailed information about the corresponding product is displayed, and detailed image information, brief description, detailed description, and discount information about the selected product by the prospective purchaser is selected. And sales information are displayed as shown in FIG.

When a predetermined purchaser selects a quantity of a corresponding product and selects a purchase application, the screen as shown in FIG. 18 is switched to the login screen as in the example of FIG. 19.

When the prospective purchaser logs in by inputting his / her ID and password on the screen, the details of the products requested by the prospective purchaser and the purchase application form form are displayed on the screen as shown in the example screen shown in FIG. 20.

After confirming the purchase application details, the prospective purchaser receives an application for the corresponding purchase details by a prescribed purchase application form.

Then, the joint purchase system determines the price of each product by the lottery based on the application details and the transaction management status information, and displays the result as shown in FIG. 21.

FIG. 21 is an exemplary diagram illustrating a case where a purchase contract paid by a certain prospective purchaser has more sales determined by a lottery, and detailed refund information on the balance is displayed on the screen.

If the purchase contract paid by the prospective purchaser is less than the amount of the sale determined by the lottery, the payment guide information for the remaining amount is displayed on the screen.

As described above, the joint purchase system of the present invention and its operation method induce interest of the prospective purchasers in that a plurality of purchasers can purchase the corresponding products at different prices within a certain range, which is cheaper than the market price of the corresponding product. This may have the advantage of attracting more customers for any product seller.

In addition, the number of buyers and sellers using the joint purchase system of the present invention is increased by this advantage, and thus there is an advantage that a higher sales can be obtained than other joint purchase systems.

Claims (12)

A first process of registering product information and sales information of a relevant product from a seller who wants to sell a certain product using a computer communication network and posting it on the web; During the purchase application period included in the sale information, the purchase application contents of a plurality of purchase planners who have paid a predetermined purchase deposit to purchase the posted product are received, and the trading status of each product item based on the purchase application details is real-time. The second process of managing with, When the purchase application period expires, based on the sales status information for each product item, the individual selling price of the products corresponding to the total quantity applied for purchase by each product item is determined within a preset range, and the corresponding selling price is determined by the respective sale price. A third process of designating a prospective purchaser to purchase a product through a drawing, Comprising a fourth step of calculating the payment information for each prospective purchaser based on the management information for each prospective purchaser to separately manage the information on the prospective purchasers, and informs the prospective purchaser and the seller of the product of the result. A method of operating a joint purchase system using a computer communication network. The method of claim 1, wherein the sales information Information on the sales period and quantity sold for the product, Discount information for each item of a commodity including information on a discount rate changeable based on a reference discount rate that changes according to the purchase request amount of the prospective purchaser and the reference discount rate, and A method of operating a joint purchase system using a computer communication network, characterized in that the sale of the product includes lottery information. The method of claim 1, wherein the fourth process Computing the purchase down payment payment of any prospective purchaser included in the management information for each prospective purchaser and the sale price specified in the third process for the product that the prospective purchaser applied for the purchase is calculated A method of operating a joint purchase system using a computer communication network, characterized in that. The method of claim 1 or 3, wherein the fourth process Operating method of the joint purchase system using a computer communication network, characterized in that for applying the bonus points according to the purchase results of the purchaser of the corresponding purchaser when calculating the payment information for each purchaser. A first process of registering product information and sales information of a relevant product from a seller who wants to sell a certain product using a computer communication network and posting it on the web; A second process of receiving a purchase request of a plurality of prospective purchasers who have paid a predetermined purchase down payment to purchase the posted goods, and managing real-time sales status of each item based on the purchase request details; A third process of determining a selling price for the products included in the purchase application within a predetermined range by drawing based on the discount information for each item included in the selling information, and Comprising a fourth step of calculating the payment information for each prospective purchaser based on the management information for each prospective purchaser to separately manage the information on the prospective purchasers, and informs the prospective purchaser and the seller of the product of the result. A method of operating a joint purchase system using a computer communication network. The method of claim 5, And repeating the second to fourth processes until the sale period included in the sales information expires. The method of claim 5, wherein the sales information Information on the sales period and quantity sold for the product, Discount information for each item of a commodity including information on a discount rate changeable based on a reference discount rate that changes according to the purchase request amount of the prospective purchaser and the reference discount rate, and A method of operating a joint purchase system using a computer communication network, characterized in that the sale of the product includes lottery information. The method of claim 5, wherein the third process A method of operating a joint purchase system using a computer communication network, wherein the lottery history information is stored and managed to be referred to at the next lottery. The method of claim 5, wherein the fourth process Computing the purchase down payment payment of any prospective purchaser included in the management information for each prospective purchaser and the selling price determined in the third step for the product that the prospective purchaser applied for purchase calculates the payment information for each prospective purchaser A method of operating a joint purchase system using a computer communication network, characterized in that. The method of claim 5 or 9, wherein the fourth process Operating method of the joint purchase system using a computer communication network, characterized in that for applying the bonus points according to the purchase results of the purchaser of the corresponding purchaser when calculating the payment information for each purchaser. In the joint purchase system that posts the sales information for a certain product on the web to recruit a number of buyers who want to purchase the product, and then provide the product at a discounted price, Storage means for storing an operation program of the joint purchase system; And A processor coupled to the storage means, the processor executing the operation program stored in the storage means, The operation program A module for posting sales information on the web, including sales periods for any goods and discount information thereof; A module for receiving a purchase request of a plurality of prospective purchasers who have paid a predetermined down payment to purchase the posted product, and determining a reference selling price for the corresponding product based on the total purchase quantity for each product; And And a module for determining a selling price for the product by lot within a preset range based on the reference selling price. The method of claim 11, wherein the storage means A computer comprising a purchase member management database, a registered product management database, a sales registration management database, a purchase application management database, a transaction status management database, a product-specific lottery information management database, and a lottery result management database. Joint purchase system using a communication network.