| 摘要 |
PURPOSE: A method and device for a trade electronic commerce capable of negotiating a price is provided to purchase a commodity at low cost by discounting a purchase price regardless of a buyer when the total selling amount of a purchase commodity with respect to a single purchaser is more than predetermined selling amount and when the total selling amount with respect to a single commodity is more than a predetermined selling amount. CONSTITUTION: Contents are connected to a plurality of buyers(101) through an Internet network(300) includes trade transaction contents(111) for supplying a user authentication and a trade transaction service, and payment contents(113). A personal information database(121) stores personal information of many clients for authentication. A buyer database(123) stores a purchase commodity with respect to a single buyer, the total selling amount of a purchase commodity with respect to a single buyer, accumulated amount of money information, etc. A commodity database(125) stores prices according to amounts with respect to a commodity, the total selling amount with respect to a single commodity, a discount rate in accordance with the total selling amount with respect to a single commodity, and amount of stored goods. A plurality of sellers(131) are connected to the trade transaction web server(110) through an Internet network and produces commodities.
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