PURPOSE: To make it possible to order an article and to pay its rate by operating a prepaid card provided with an identification(ID) code and observing a required article on a still image.

CONSTITUTION: A customer inserts a prepaid card into a card reading processing part 7, inputs his (or her) ID code to make the card usable state and then calls a receiving subscriber. The receiving side returns necessary data such as a still image for a commodity concerned and its rate to the customer through a still image terminal 11. When the customer inputs a temporary order, the balance of the card is transmitted to the terminal 11, and when a value obtained by subtracting the price of the commodity from the balance of the card is plus, the seller returns image data such as calculation details indicating the price and the balance and a real order input waiting state. While referring to the returned image data, the customer executes a real order by the depression of prescribed keys. Consequently the price of the article is subtracted from the card balance and calculation details and a receipt are printed out.