Multimedia advertising system of commercial display consists of server, network, and digital signage displays. The information of the server is sent to the player through the network (applicable to Wan/LAN/private network, including wireless network), then, combines audio and video, pictures, text and other information (including playing position and playing content, etc.), and transmits the audio and video input acceptable to commercial display such as LCD TV to form the playing of audio and video files, in this way, a set of links that can send all server information to terminals through the network is formed.