There are three main types of ordering machines. The first kind of ordering machine is the simplest, button-type, single-chip ordering machine, which is widely used in the market. The second kind of ordering machine is touch-screen PDA ordering machine, which is not used much. The third type is a large touch screen ordering machine with electronic menu, more than 7 inches. Support wireless ordering, convenient and fast. Through the intelligent ordering machine with wireless function, the waiter can order and add food for customers anytime and anywhere, and transmit the data to the printers in the background, kitchen and foreground, and the printers can print out the menu immediately. All the operation data are stored in the database in the background for reference. Its function covers almost every link of hotel store service.