To shorten transaction hours by precedently providing knowledge of a menu prepared by a store at a commodity transaction so that a customer can immediately order a commodity in a store, enhance sales efficiency for the store, eliminate long waiting time in a customer side for purchase of the commodity, prevent disappointment of the customer regarding the menu, and speed up and smoothen the commodity transaction between the store and the customer.

A management server 4 can be connected from a customer terminal 1 owned by the customer. When information regarding the store and time is received from the customer terminal 1 as electronic data, menu information prepared by the store at the received time is retrieved from a database 12A, and the retrieved menu information is sent to the customer terminal 1 as electronic data.