To provide a food purchasing information allowing speedy and inexpensive food required for executing a cooking menu.

A home terminal 1 obtains food information from a refrigerator 2 or food stocker 5 in a home, accesses a cooking menu supplying server 14 through the Internet 3, and makes a plurality of preferred cooking menus to be selected. For a preferred cooking menu requiring addition of a food, purchasing information of the added food is displayed by accessing an inexpensively selling information supplying server 17, and when an order is placed, the order processing can be performed by accessing a food order receiving server 18. Thus, the purchasing information of the food can be speedily and suitably obtained and the order can be placed at the home.