In this paper, the development of research, which is monitoring system applications for a bridge. As a member of the project team to participate in variable message sign of the bridge monitoring system for information displaying design and development work. Through the development of variable message sign of the information display system, I know the step and the carry out of the bridge monitoring ,understand how to use existing technology to solve the problem of road safety and reduce security risks to ensure that the traffic master. Now the bridge monitoring system has been put into use.