Advertising machine is the common name of digital signage. It is mainly installed in large shopping malls, supermarkets, hotel lobbies, restaurants, cinemas and other public places where people gather. It uses large-screen terminal display equipment to release commercial, financial and entertainment information. Professional audio-visual system. With the development of science and technology, advertising machines now integrate infrared touch technology, capacitive touch technology, PC technology, big data technology and various other Internet of Things technologies to meet the needs of various application scenarios. Its main functions include audio, video, picture and text display, timing on and off, touch interaction and other functions. According to the screen size, it can be 7-100 inches. The wall-mounted advertising machine is distinguished according to the installation method of the advertising machine. The wall-mounted advertising machine is fixed on the wall or other load-bearing buildings through the wall-mounted board.