The invention relates to an urban intelligent supervisory system based on cloud computing. The urban intelligent supervisory system based on cloud computing comprises an urban intelligent supervisory center, a cloud computing platform, a handheld information terminal and a fixed high-definition monitoring camera, wherein the handheld information terminal and the fixed high-definition monitoring camera are connected with the cloud computing platform. The cloud computing platform comprises a cloud computing data analysis unit, an urban management history information database server, a data storage unit, a GIS server and a network communication server, wherein the urban management history information database server, the data storage unit, the GIS server and the network communication server are connected with the cloud computing data analysis unit, and the urban management history information database server is connected with the urban intelligent supervisory center. The handheld information terminal comprises a data storage module, a GPS module, a 4G communication module, a data processing module, a GPRS communication module and a 3G communication module and is connected with the network communication server through a wireless network. The fixed high-definition monitoring camera is connected with the network communication server. By means of the urban intelligent supervisory system based on cloud computing, problem processing is accelerated, and data sharing is achieved. Furthermore, the urban intelligent supervisory system is high in reliability and low in cost.