The ad hoc network will provide technical support for architecture industry and fire fighting system. Our research team proposes a real-time video information transport system based on hierarchical ad hoc network and related video conference system. The topology of ad hoc network is changing all the time, and the essential of the network is centralless and loosely. There is mismatch between the distributed network and centralized software system, and that will affect the performance of whole system. So this paper proposes a distributed video conference system in order to improve the performance of the system. Our proposed system includes basic functions of the video conference, such as audio/video conference, file transportation and literal chatting. We believe that our system will make the collaboration work of construction site and the command work of fire fighting more conveniently and simple.