TWI501617B - System and method for issuing electronic invoice by mobile phone - Google Patents

Description

System and method for opening an electronic invoice using a mobile phone

The present invention relates to a system and method for opening an electronic invoice using a mobile phone, and more particularly to an apparatus and method for opening an electronic invoice through a third neutral institution using a mobile phone.

In the traditional process of opening an invoice, the seller must first apply to the tax unit for a batch of invoice numbers. When the buyer purchases the goods from the seller, the seller will, in addition to delivering the goods, open an invoice containing an invoice number. Family. However, in order to carry out the aforementioned procedures for opening an invoice, the seller will add a lot of extra work and will need to purchase many equipment for invoicing, such as a cash register. The device that opens the invoice is expensive, heavy, takes up a lot of space, requires external power source, is inconvenient to carry, and has complicated operation, which will reduce the seller's willingness to invest. Whether it is the seller's paper invoice stub or the buyer's paper invoice, its preservation, reconciliation, auditing, accounting, auditing and government agency's tax inspection work are quite time-consuming and labor-intensive, increasing the buyer and seller, The time wasted and money spent by accountants and tax authorities, which inevitably raised the cost of the overall transaction. Even if the invoice for online transactions is electronic, the above process is not removed, and the equipment used to open the electronic invoice is more expensive than the traditional equipment. The seller needs to learn complicated operation methods, which is quite inconvenient.

The shortcomings of the aforementioned conventional methods are especially noticeable for small-scale sellers. Since the opportunity for small-scale sellers to open invoices is not as frequent as the average store or company number, the cost of applying for invoices and purchasing equipment is more significant.

In addition, in the traditional mode, even if the seller invests funds and obtains equipment to open an invoice, the invoice is saved for inspection and the inconvenience caused by the inspection, and the cost of the account is relatively high (the prescribed turnover is less than 60,000 yuan). Factors such as fixed taxation can not only cause confusion for the seller, but also increase the cost of tax account checking. For example, if the tax unit wants to check the tax information of a large number of small-scale sellers to confirm whether there is any false or false report, it is necessary to separately check the various buyers and sellers, which is not only inefficient, but also wastes the overall social resources.

In summary, how to reduce the burden on sellers to open and purchase electronic invoices and the cost of accounting taxes is the goal that is urgently needed.

One aspect of the present invention discloses a system and method for opening an electronic invoice using a mobile phone to reduce the cost of the seller to open an invoice.

Another aspect of the present invention discloses a system and method for opening an electronic invoice by using a mobile phone. By opening an electronic invoice through a simple operation interface, the seller can easily open an electronic invoice without purchasing additional hardware devices.

Yet another aspect of the present invention discloses a system and method for saving an electronic invoice through a third neutral institution by using a mobile phone, and as a basis for the accounting system, reducing the overall transaction cost and simplifying the auditing process by standardized invoice management. And complexity.

Another aspect of the present invention discloses a method for opening an electronic invoice by using a mobile phone, comprising the steps of: the seller inputs the transaction information and the phone number of the buyer to the seller's mobile phone; and the operator sends an instruction to open the invoice to the third party. The value service center, the instructions for opening the invoice include the transaction information and the telephone number of the buyer; the transaction information is transmitted to the buyer by the carrier; and the content of the invoice is transmitted to the tax center by the carrier. Alternatively, the telecommunications operator may first transmit the contents of the invoice to the third-party value-added service center, and then send the transaction information to the buyer and/or tax center by the buyer's telephone number after receiving the confirmation notice.

One aspect of the present invention discloses a system for opening an electronic invoice by using a mobile phone, including a mobile phone of a buyer, having a phone number for identification; a mobile phone of the seller, loaded with a control module for the seller to input transaction information and a phone number of the buyer; A third-party value-added service center that provides value-added services for managing invoices and organizing electronic books; and telecom operators for selectively receiving or transmitting messages to third-party value-added service centers, buyer's mobile phones, and sellers' mobile phones. When the buyer completes the transaction with the seller, the seller's mobile phone transmits the invoice content to the third-party value-added service center and the buyer through the carrier, or transmits the content of the invoice to the third-party value-added service center. After the value-added service is performed at the third-party value-added service center, it is transmitted to the buyer.

Another aspect of the present invention discloses a mobile phone for opening an electronic invoice, which is loaded with a control module for performing the following steps: receiving transaction information input by the seller and a phone number of the buyer; and sending an invoice via the telecommunication provider The instructions are directed to a third-party value-added service center, which includes transaction information and the buyer's phone number.

Yet another aspect of the present invention discloses a communication facility for opening an electronic invoice using a mobile phone, comprising a processing module for performing the steps of: receiving an indication of an open invoice transmitted by a seller, the indication including transaction information and a telephone number of the buyer; Open the contents of the invoice to the third-party value-added service center; and transmit the transaction information to the buyer by the buyer's phone number.

The terminology and terminology used herein is used to enable those skilled in the art to understand the invention, and the description should not be construed as limiting. For example, the term "one embodiment", "an embodiment" or "an equivalent" is used to mean a particular feature, structure, or characteristic of an embodiment of the invention. Therefore, the phrase "in one embodiment" is not necessarily the same embodiment.

It will be apparent to those skilled in the art that the present invention, when implemented as a system, apparatus, or method, can be embodied in various forms, such as a complete hardware embodiment, a complete software embodiment (including firmware, resident software, microcode, etc.) ), or may be implemented as a software and hardware implementation, which will be referred to as "circuit," "module," or "system."

The mobile phone referred to in the present invention may be used for voice communication or short message service by a carrier using any conventional architecture such as GSM, GPRS, WCDMA, CDMA or any other similar manner, and the present invention It can also be implemented in a personal digital assistant with a mobile phone function, a smart phone or the like.

As mentioned above, in the traditional way of opening an electronic invoice, not only is it necessary to invest extra cost to purchase special equipment, but also it takes a considerable amount of time to learn to use the special equipment to open an electronic invoice, and the present invention discloses a Utilizing the existing and popular mobile phone and communication architecture, it provides a system and method for opening electronic invoices, which not only lowers the usage threshold, but also increases the seller's willingness to invest, and at the same time simplifies the storage and verification of accounting data.

1 shows a system 10 in accordance with an embodiment of the present invention, including a seller's mobile phone 100, a buyer's mobile phone 200, a carrier 300, and a third party value-added service center 400. The buyer's mobile phone 200 has a phone number for others to connect to the buyer's mobile phone 200 via the carrier 300 using voice services, messaging services, or other value-added services. The mobile phone 100 of the seller is loaded with a control module 110 for the seller to input the telephone number of the buyer and the transaction information 112 (described later) and transmitted to the mobile phone 200 of the buyer via the carrier. The third-party value-added service center 400 provides value-added services such as saving electronic invoices or managing electronic books, such as applying for a batch of invoice numbers to the tax center 500, saving electronic invoices, establishing, organizing, and analyzing electronic books. The third-party value-added service center 400 further has a database 410 for storing information about all open electronic invoices for use by buyers, sellers or other legally authorized persons, for example, in this example, a third-party value-added service center. 400 sorts all relevant accounting data corresponding to the same seller into an electronic account book, and the tax center 500 can directly check the data stored in the third-party value-added service center 400 through the remote connection as evidence of tax payment. Similarly, the third-party value-added service center 400 can also organize all relevant accounting data corresponding to the same buyer into another electronic account book, and transmit a notification message to the tax center 500 when necessary to facilitate the taxation operation. The carrier 300 has a communication facility 310 for selectively receiving or transmitting messages to the seller's mobile phone 100, the buyer's mobile phone 200, and the third party value-added service center 400, for example, by transmitting or receiving a message via a GSM connection. The Carrier 300 Series is connected to the Third Value Added Service Center 400 for data transmission and exchange.

When the buyer completes a transaction with the seller, the seller's mobile phone 100 sends an instruction 112 to open the invoice to the carrier 300, and the carrier 300 transmits the transaction information to the buyer's mobile phone 200 by the buyer's telephone number. In addition, the content of the invoice is transmitted to the third-party value-added service center 400 to generate a record of the opening of the electronic invoice. It should be noted, however, that the present invention discloses a system and method for opening an electronic invoice by using a mobile phone, without limiting the form or medium used by the actual transaction, whether it is an entity transaction or an electronic transaction. Also, regardless of whether the transaction is conducted and the invoice is opened simultaneously or sequentially, the implementation of the present invention is not affected. The sellers and buyers referred to in this article are not limited to individuals, companies, non-profit organizations, consortium legal entities, corporate legal persons, etc., but also include government agencies and other units that are customarily used to conduct transactions. In addition, regardless of the type of transaction, between individuals and individuals, between enterprises and individuals, between enterprises and enterprises, between governments and individuals, between governments and enterprises, or even between government agencies and government agencies, Affects the implementation of the invention.

Figure 2 further depicts a method in accordance with an embodiment of the present invention. The method begins in step S200, when the buyer and the seller's transaction are established, but the invention does not limit the form and type of the transaction as described above. At step S201, the seller inputs the phone number of the buyer and the transaction information to the mobile phone 100 of the seller. Since the present invention utilizes a general mobile phone, such as a mobile phone, and through the general communication architecture to open an electronic invoice, the buyer and the seller do not need to purchase special equipment for the opening and receiving of the electronic invoice, only the seller The mobile phone 100 can support the opening invoice function described in the present invention, and greatly reduces the threshold required for opening an electronic invoice. The seller's mobile phone 100 can reach a method for supporting the opening of an electronic invoice in many ways, and the present invention is not limited thereto. For example, the carrier 300 can sell the value-added function mobile phone of the built-in control module 110, or the seller can also After purchasing the general mobile phone, the software is downloaded and installed to the carrier 300 or the third-party value-added service center 400 to provide the function of the control module 110. The software download can be downloaded by various forms and carriers, for example, the seller can directly purchase the software from the third-party value-added service center 400, or can be downloaded to the webpage provided by the carrier 300 via the Internet. The program type of the software can also use various commonly used programs, such as Java compatible programs, and then installed on a general mobile phone.

3A and 3B show a user interface 120 of a mobile phone in accordance with an embodiment of the present invention to facilitate the seller to input relevant information required to open an electronic invoice. In this example, the process entered by the seller is a two-stage process. Referring to FIG. 3A, in the first stage, the seller may input transaction information related to the product, including but not limited to the product name 122, the product unit price 124, the product quantity 126, and the product price subtotal 128, or the control module 110 may also borrow The product price amount is automatically generated by the product unit price 124 and the quantity 126. The remarks column 130 is an optional field for the seller to input additional information, such as whether to invoice the invoice to other public interest groups or other invoice processing methods or other product description information related to the product. In one embodiment of the invention, the remarks column 130 can be selectively generated by the seller's mobile phone 100 automatically including the following information: an invoice number (eg, QQ 12345678), an invoice date (eg, 990101), an invoice time (eg, 235959), seller information, buyer information, invoice check code, buyer's note (for example: the purchase and deduction of the transaction, the fixed assets deducted from the transaction, the purchase and non-deductible of the transaction and the fee and The fixed assets that cannot be deducted in this transaction), the last four digits of the credit card (for credit card online transactions), the customs clearance method (for example: non-customs export or customs export), tax center name (for example: Ministry of Finance, Taipei City) National Taxation Bureau Da'an Branch), approval date, approval number (for example: Caibei National Tax Da'an Business Name Approval No. 094xxxxxx), offset account, relevant number, invoice category (for example: triple, two-way, two-link Cash register, special tax, electronic computer or triple cash register), remittance notes (for example, "*" means remittance) and donation notes (for example, 0 for non-donation invoices, 1 for donations) Invoice). In other embodiments, the input order, time, and the like of the fields described above may also be manually input or automatically generated in any step or any field according to actual needs. When the seller's input is complete, you can then choose whether there are other items that need to be settled, as shown. If other products need to be settled, when the user clicks the function key of "Next", the first step of the foregoing steps may be repeated in this embodiment, and details are not described herein again. If there is no other product, this embodiment will enter the second stage when the user clicks the "Next" function key. Referring to FIG. 3B, in the second phase, the control module 110 first automatically generates the total price of all the commodities for the seller to confirm, and the seller can selectively input other related information for identifying the buyer. For example, in this example, the seller must select the object 132 to open the invoice, such as an individual, company, or nonprofit organization, and enter the buyer's phone number 134, as well as other information, such as an identity card number or a uniform number (or collectively referred to as "sales identification." Code") and so on. In this embodiment, the exact time for the electronic invoice to be opened is based on the time of the third-party value-added service center 400 to avoid the time difference caused by the different electronic device settings or the delay in opening the invoice. However, in other embodiments, depending on the actual situation, the time of the buyer, the seller, the carrier, the government agency, or other independent institutions may be used, or other time synchronization technologies may be used between the electronic devices to unify. Invoice opening time. It is to be noted that the foregoing transactional materials or buyer's materials are used for purposes of illustration only and are not intended to limit the invention. For example, depending on the actual transaction needs, the relevant transaction information may also include less or more information, or other information not specified in this example, such as the name of the buyer, the product including tax or untax, etc., the present invention Not limited. After the input is completed, it is convenient to select the function key of "confirm send" to complete the input of the data. Of course, in the process, the seller can click the “Cancel” function button at any time to cancel the opening of the electronic invoice.

It should be noted that FIG. 3A and FIG. 3B are merely illustrative examples, and that many different modifications and variations are possible in the present invention. For example, the two-stage sequence of the present invention may be reversed, or a single stage may be used to input all data at once, or more stages of input methods. In addition, many related transaction materials can also be built with various preset values for the seller to directly click to speed up the operation of invoice opening. Referring to Figures 4 and 5, there is shown another exemplary embodiment of the present invention for the seller to checkout and open an invoice more quickly. In another embodiment shown in FIG. 4, the seller's mobile phone 100 can be coupled to a scanner 140 in an external manner to read the bar code 144 attached or printed on the item 142. When the seller wants to open the invoice, the barcode 140 can be read by the scanner 140, and the product 142 can be directly recognized by the control module 110, and all related materials of the commodity 142 can be automatically read by the built-in or other means. , including product name and product unit price. In this way, the speed at which the seller can input the commodity data can be expedited, and the process of opening the invoice can be simplified.

Referring again to the further embodiment shown in FIG. 5, at this time, the seller's mobile phone 100 can directly capture the barcode 154 attached or printed on the article 152 by using the built-in external camera lens 150, such as a commonly used QR code. . When the seller wants to open the invoice, the barcode 154 can be photographed by the camera lens 150, and the product 152 can be directly recognized by the control module 110, and all relevant materials of the commodity 152 can be automatically read by built-in or by other means, including Information such as product names and product unit prices can also be used to streamline the process of opening invoices. Furthermore, the camera lens 150 can also be used to capture other relevant information of the product and store it for future verification or comparison. For example, the camera lens 150 can also be used to capture the buyer's appearance, business card, company logo or other icons, or can be used to capture information such as the surrounding environment during the transaction. In addition, since most of the current mobile phones are equipped with a digital camera lens as a standard, the use of such an embodiment does not impose an additional burden on the user, and further enhances the method for the seller to introduce the electronic invoice disclosed in the present invention. Willingness.

Referring now back to FIG. 2, after the seller inputs the data, the control module 110 of the seller's mobile phone 100 generates an indication 112 for opening the invoice based on the entered information. Next, in step S202, the vendor's handheld device 100 transmits an indication 112 to open the invoice to the third party value-added service center 400 via the carrier 300. In this embodiment, the indication 112 for invoicing is sent by means of a general short message. Therefore, the control module 110 can add a discriminating flag to the indicator 112 for opening the invoice so that the telecommunications provider 300 can distinguish from the general short message. . In step S204, the processing module 312 of the carrier 300 reads an indication 112 for opening an invoice to determine whether or not there is a discriminating flag, but this step is not necessary. In other embodiments, the carrier 300 can also process the processing according to the direct normal messaging process. In this embodiment, if the received information does not contain the discriminating flag, the processing module 312 processes according to the general short message process. Otherwise, if the received information is found to contain the discriminating flag, it is determined that the information is open. Instructions for invoices. Next, in step S206, the telecommunications provider 300 transmits the content of the invoice to the third-party value-added service center 400 for the third-party value-added service center 400 to actually open an electronic invoice or manage the seller to open an electronic invoice. And record the actions of the buyer. In step S208, the telecommunications provider 300 transmits the transaction to the buyer 200 by the buyer's telephone number, so that the buyer knows the relevant reward for the electronic invoice. The method of the present invention ends at step S210.

The third-party value-added service center 400 may apply in advance to the tax unit for a batch of invoice numbers, and when the seller makes an instruction to open an invoice, assign a specific one or more invoice numbers for the transaction. Therefore, the seller does not need to apply for the invoice number to the tax unit individually, but the third party value-added service center 400 uniformly applies and distributes, which is more convenient and efficient in management. In another embodiment, the seller may also register a seller identification code with the third-party value-added service center 400 only when the initial invoice is opened, and add the seller identification code to the electronic invoice number when the electronic invoice is subsequently opened. In this way, electronic invoices can be opened continuously and more quickly.

For example, the electronic invoice number in this embodiment may be in the following format:

[Seller Identification Code] [Word Track] [Invoice Serial Number]

In this embodiment, the seller identification code can use the seller's mobile phone number, the word track is a few digits of the English alphabet or a few digits of the code (for example, using the English code of the two-digit code), and the invoice serial number is a few The number of the bit code (for example, using an eight-digit number). When an electronic invoice is opened in this way, the buyer's information can be easily identified by the format of the electronic invoice number, regardless of the buyer, the third service platform or the taxation unit, which facilitates the management and verification of subsequent electronic invoices and electronic books. . Therefore, the seller can simply open the electronic invoice continuously, which further simplifies the opening of the invoice.

For the third-party value-added service center 400, after receiving the electronic invoice content opened by the seller each time, it will be stored in the database 410 and further organized into an electronic book. The third-party value-added service center 400 can further provide other value-added services, for example, calculating the total amount of the invoice issued by the seller in a fiscal year. If the total amount exceeds a depreciation, the seller shall be notified of the follow-up action of the tax return, or the relevant information shall be notified to the tax center 500 for the purpose of conducting the tax check.

Through the above method, the buyers and sellers of the transaction can purchase the electronic invoice without purchasing any special equipment, which greatly reduces the operating cost, the tax center 500 or other legally authorized institutions, and does not need to By establishing a connection or other checking mechanism, all management and checking operations can be centrally managed, greatly simplifying the operation process.

The embodiments described above are intended to describe the invention, but many modifications and variations are possible in the art. For example, the foregoing embodiment is exemplified by directly transmitting the information of the clear code. However, the present invention is not limited thereto. For example, to enhance the security of the electronic invoice opening, all transmitted information can also be transmitted in an encrypted manner. Does not affect the implementation of the invention. Alternatively, after the completion of the invoice, the third-party value-added service center 400 may also send a notification of the newsletter to the buyer and the seller through the carrier 300 as a confirmation message. Or in another embodiment, the seller only issues an instruction to open an invoice, which is forwarded by the telecommunications provider 300 to the third-party value-added service center 400, and the third-party value-added service center 400 actually opens an electronic invoice to the buyer. The action. In this embodiment, the third-party value-added service center 400 can further centrally manage the operation of the seller to open the electronic invoice, and can also provide other value-added services. For example, since the opening of the electronic invoice is performed by the third-party value-added service center 400, the third-party value-added service center 400 can perform preliminary check work before opening the invoice, for example, third-party value-added work. The service center 400 manages whether the invoice amount of the seller exceeds the threshold of the tax payable, whether the seller has the relevant margin for providing tax work, whether the seller’s tax payable has exceeded the guarantee amount of the deposit and the seller’s transaction credit, etc. Seller's transaction credit history). The third-party value-added service center 400 can further selectively notify the buyer or seller of the relevant information in a short message. For example, the third-party value-added service center 400 can notify the seller that it has reached the tax threshold, the guarantee amount is insufficient or even serious, and can refuse to open the invoice to avoid complications of subsequent tax issues, or The seller may also inform the buyer of the transaction credit rating and the tax record. This will reduce the tax center's operations and simplify tax filing and tax collection.

Briefly, in this embodiment, the telecommunications provider 300 forwards the indication to open the invoice to the third-party value-added service center 400 after the indication that the seller has opened the invoice includes a discriminating flag. At this time, the third-party value-added service center 400 can first investigate the relevant transaction credit records of the aforementioned sellers to open electronic invoices. If the transaction credit record is confirmed to be correct, for example, if the seller's transaction credit is good, the tax is not owed or the invoice is not invoiced, the third-party value-added service center 400 issues a mark to the buyer. The third-party value-added service center 400 can effectively manage the operations of all sellers to open electronic invoices.

Therefore, the present invention is not limited by the description of the specific embodiments of the invention, and the scope of the invention is intended to be

10. . . system

100. . . Seller's mobile phone

110. . . Control module

112. . . Instructions for opening an invoice

120. . . user interface

122. . . product name

124. . . Product unit price

126. . . merchandise quantity

128. . . Subtotal of product price

130. . . Remarks column

132. . . Opening an invoice

134. . . Buyer's phone number

140. . . Scanner

142. . . commodity

144. . . Bar code

150. . . camera lens

152. . . commodity

154. . . Bar code

200. . . Buyer's mobile phone

300. . . Telecommunications operator

310. . . Communication facility

312. . . Processing module

400. . . Third-party value-added service center

410. . . database

500. . . Tax center

Figure 1 shows a system in accordance with an embodiment of the present invention;

Figure 2 shows a method in accordance with an embodiment of the present invention;

3A and 3B are diagrams showing a user interface of a mobile phone according to an embodiment of the present invention;

Figure 4 shows a bar code for reading an article of merchandise in accordance with an embodiment of the present invention;

Figure 5 shows a two-dimensional bar code for a built-in camera to capture merchandise in accordance with an embodiment of the present invention.

10. . . system

100. . . Seller's mobile phone

110. . . Control module

112. . . Instructions for opening an invoice

200. . . Buyer's mobile phone

300. . . Telecommunications operator

310. . . Communication facility

312. . . Processing module

400. . . Third-party value-added service center

410. . . database

500. . . Tax center

Claims (11)

A method for opening an electronic invoice by using a mobile phone, comprising the following steps: a third-party value-added service center obtains a batch of electronic invoice numbers in advance; and a seller uses the mobile phone of the seller to input one transaction information of the buyer and one a telephone number to a mobile phone of the seller, wherein the mobile phone of the seller is loaded with a control module for the seller to input the phone number of the buyer and the transaction information; and the seller's mobile phone sends an open invoice And the instruction to open the invoice includes the transaction information and the telephone number of the buyer; the third party adds the instruction to open the invoice through the mobile phone of the seller when the seller issues the instruction to open the invoice The value service center generates an electronic invoice record for the instruction to open the invoice, and assigns an electronic invoice number to the electronic invoice record from the electronic invoice number of the batch; and the third party value-added service center is based on the buyer The telephone number transmits the electronic invoice number and the transaction information to the buyer; thereby the seller is in the buyer's No need to get yourself in advance before the electronic invoice number. The method of claim 1, wherein the step of inputting the transaction information further comprises: inputting transaction information related to the product; and inputting transaction information for identifying the buyer. The method of claim 1, wherein the step of inputting the transaction information further comprises inputting information selected from at least one of the following: an invoice time, a product name, a product unit price, a product description, a buyer name, Buyer classification, buyer identification code, buyer's address and invoice processing method. The method of claim 1, further comprising: determining, by the carrier, whether the indication for opening the invoice includes a discriminating mark; and when the indication for opening the invoice includes the discriminating flag, the telecommunication provider is receiving When a token is sent to the third-party value-added service center, the step of transmitting the transaction information to the buyer is performed. The method of claim 1, wherein the electronic invoice number comprises a seller identification code, a word track and an invoice serial number. The method of claim 1, further comprising the steps of: the third-party value-added service center evaluating the transaction credit record of the seller; the third-party value-added service center storing the electronic invoice issued by the seller; The third-party value-added service center establishes the electronic account book of the seller; and transmits a notification message to the seller to indicate that the total amount of the invoice issued in the fiscal year has reached a depreciation. The method of claim 1, further comprising the steps of: establishing, by the third-party value-added service center, the electronic account book of the seller; and transmitting a notification message to a tax center. A system for opening an electronic invoice by using a mobile phone, comprising: a mobile phone of a buyer having a telephone number for identification; a mobile phone of a seller, the mobile phone carrying a control module for the seller to input the buyer a telephone number and a transaction information; a third-party value-added service center providing a service for saving electronic invoices and obtaining a batch of electronic invoice numbers in advance; and a carrier for selectively receiving or transmitting messages to the third party for value added a service center, a mobile phone of the buyer, and a mobile phone of the seller; wherein, when the seller completes a transaction with the buyer, the seller's mobile phone Sending the instruction to open the invoice to the third-party value-added service center, and the third-party value-added service center assigns an electronic invoice number from the batch of electronic invoice numbers, and the buyer's telephone number transmits the electronic invoice The number and the transaction information are sent to the buyer, whereby the seller does not need to obtain the electronic invoice number in advance before trading with the buyer. The system of claim 8, wherein the transaction information includes inputting information selected from at least one of the following: time when the invoice was opened, product name, product unit price, product description, buyer name, buyer classification, buyer Identification code, buyer's address and invoice processing method. The system of claim 8, wherein the third-party value-added service center applies to the tax center for the electronic invoice number of the batch, wherein the electronic invoice number includes a seller identification code, a word track and an invoice. serial number. A method for assisting a seller to open an electronic invoice includes the following steps: a third-party value-adding center obtains at least one batch of electronic invoice numbers in advance; the third-party value-adding center accepts an open invoice sent from a seller's mobile phone Instructing that the instruction to open the invoice includes one of the buyer's transaction information and a telephone number, wherein the mobile phone of the seller is loaded with a control module for the seller to input the telephone number of the buyer and the transaction information; The Tripartite Appreciation Center generates an electronic invoice record for the instruction to open the invoice, and assigns at least one electronic invoice number to the electronic invoice record from the electronic invoice number of the batch; the third-party value-adding center is based on the buyer's telephone number Send the electronic invoice record and electronic invoice number to the buyer.