The invention relates to a city operation system which comprises a video resource aggregation device, a large data fusion processing platform, a cloud resource scheduling platform, a monitoring platform and a service bus. The video resource aggregation device is used for achieving unified fusion of various communication networks such as a city broadcast television network, the Internet, a communication network and an analog / digital bus. The large data fusion processing platform uses a multi-structure data fusion technology for carrying out unified fusion on isomerous data. According to the cloud resource scheduling platform, a resource pool is established through a virtualization measure, and system resource integration is carried out. According to the monitoring platform, various safety mechanisms are used for guaranteeing all-around safety protecting. The service bus provides universal type and standard type application program interfaces. Dynamic connecting in of front end video equipment is supported, whole resources are supported, a service mode is used for dynamic registering, a user, equipment and data are monitored in a hierarchical mode, system monitoring efficiency is improved, the large data technology is used for carrying out distributing collecting, storing, fusion and analyzing on city mass isomerous data, and data efficient management is achieved.