A play system of video and lantern slide, which comprises a computer, a projector, and a data wire, also comprises a video switch controller and a network switch, at least three computers in the play system are respectively taken as a platform terminal by which the speaker can control the play progress; a background terminal for switching the background picture; a remote control terminal for monitoring the operation condition of the platform terminal and transferring the data to the platform terminal, wherein, the platform terminal and the background terminal are connected with the video switch controller simultaneously, a video signal is selectively transmitted to the projector by the video switch controller, the platform terminal and the remote control terminal form a local area networkby the network switch and are connected with each other to implement the transmission of the control data and the video data. According to the invention, the local area network is formed by connecting the video switch controller with the network switch to switch and control the play progress of the video signal in real time, thereby improving the play continuity between different video data and improving the fluency of the speech.