At present, the domestic colleges and universities are actively promoting the construction of the campus intelligent surveillance network, but there are differences in realizing technology and appliance platform. Through the study of video codec works and external interfaces from video makers, proposes the application of intermediate technology to unify the current audio and video device codec interfaces, and then uses Web Service to transmit multi-level video information. The experiment proves that the method solves the problems of incompatible video coding between different devices and cross platform interaction. It is significance of realizing fusion of various types of equipment in digital campus construction and building a harmonious and safety campus.