Smart city operation public management system based on BIM

The invention, which relates to the technical field of the smart city, discloses a BIM-based smart city operation public management system comprising a GIS analysis module, a model generation module, a sensing module, a BIM city digital twin module and an application software development module. According to the method, a BIM information digital model of the whole city is generated through a geographic information system, design drawings of buildings in the city and unmanned aerial vehicle photographic images; data of people flow, electric power, traffic, carbon emission, building maintenance and city safety in a city are obtained through a camera sensing network, a personnel sensing network, an electric power sensing network, a traffic sensing network, a carbon emission sensing network, a building maintenance sensing network and a safety sensing network, and centralized and visual analysis of the data is carried out. And urban operation and maintenance management is executed, so that the problems of lack of