Abstract:With the frequent occurrence of extreme severe weather in China, the flooding of urban road tunnels has repeatedly caused serious personal and property losses. In order to minimize the occurrence of similar accidents, it is necessary to build tunnel water monitoring system according to the tunnel conditions. Based on the Jin’guangdong avenue tunnel of Guangzhou Nanda main line project, this paper discusses the framework and content of the tunnel water monitoring system. Based on transportation facilities, intelligently, efficiently and humanely avoid the flooding accidents of the tunnel.