To provide an article/service and selling/buying system for providing profits to each of user, public office, designated dealer and system operator concerning a selling/buying system for providing an article/service while utilizing the Internet.

Concerning the article/service selling/buying system respectively connected with a user who requires an article/service related to education, welfare, social caring and attendance, and plural designated dealers through telecommunication facilities, when article/service order data, user data and dealer data are transmitted from a user side terminal, these data are received and registered later. After the supply of a relevant article/service to the user is fulfilled, bill data for demanding the payment of the charge of the article/ service to the user are transmitted through the telecommunication facilities to a designated dealer side terminal.