An ordering system has a server device and client device communicably connected via a network, with the server receiving orders from the client device. The server device comprises a receiving unit for receiving the order information from the client device and writing to memory, an order model managing unit for managing order information as an order model, and a sending unit for automatically sending the order model managed by the order model managing unit to the client device. The client device comprises a receiving unit for receiving the order model, an order model saving unit for saving the order model, an order information editing unit for editing the order information written to the order model saved at the order model saving unit, and a sending unit for sending the order model with order information edited by the order information editing unit to the server device.