To provide the lowest purchase price (bottom value) of an article to a client.
In an article purchase support system 1 for supporting the article purchase of the client, this system is provided with a receipt DB 34 for storing client purchased article identification information, which is successively issued when the client utilizes a store, and computerized receipt data corresponding to a receipt R containing a purchase price thereof while relating them to the identification information of the correspondent client and a server 40 for service providing processing for finding the lowest purchase price corresponding to the client identification information and article identification information inputted from the client side through a personal computer(PC) 10ak or BS digital TV 11ak having an information display function on the basis of the computerized receipt data and transmitting the found lowest purchase price to the PC 10ak or BS digital TV 11ak of client identification information input source corresponding to the inputted article identification information.
OTAWA MOTOMU
SUGANO KAZUHIKO
NOZAWA YUKITERU
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