To provide a system for supporting sales, which enables a customer inquiring about a merchandise to work toward purchasing for the person introducing and introducing the merchandise to other prospects, by reporting the status of business negotiation to the person introducing inquiry on the merchandise.

The system for supporting merchandising comprises a database 16 for storing the status of business discussion under negotiations, a means 17 for registering the information of the person introducing, who has introduced the prospect for purchasing the merchandise, in the database 16, a business data input means 20 for acquiring the business information and storing them in the database 16, and a mail-transmitting means 21 for generating a report mail, on the basis of the business discussions registered in the database 16 and transmitting it to the person introducing the prospects, via the Internet 12, when business information is input through the input means 20.