Embodiments relate to ordering food using RFID. Tag information is read from at least one of tags matched to each of multiple products of a menu by using a mobile terminal having a built-in RFID module or an RFID external module. A main server is accessed through a URL corresponding to the tag information. Product information corresponding to the tag information is received by the mobile terminal from the main server. The number of the products are filled out and an order request message is transmitted to the main server by the mobile terminal. The order request message is received and a payment is performed according to the order. An order item is transmitted to a kitchen server by a Point of Sales (POS) server connected to the main server if the payment is completed.