A dish provider provides a user with dishes, through a dish-providing assisting server, in cooperation with one or a plurality of dish makers. An ingredient information DB stores date information representing dates before that ingredients should be best used. In response to an order for dishes from the user, the dish maker having ingredients for the dishes in stock searches the ingredient information DB for the date information, and sends an order for a set of dishes to the dish maker. An order for those ingredients used for the ordered dishes is sent to a client device of an ingredient seller.