Abstract: According to the actual situation in the construction of UHV substation, a design idea of UHV digital management and control system based on BIM technology and the realization scheme of each main function are proposed. The system uses various IoT sensing devices to collect real-time information in engineering construction,uses BIM model to build a three-dimensional substation scene as a carrier to carry information, and couples,calculates, and analyzes sensor and model information to achieve management functions at all levels And information collection, all kinds of auxiliary information are fed back to the 3D model to achieve intelligent, refined and digital management. The system is fully applied in the Nanchang 1000kV UHV substation project, which effectively saves the communication cost and process control cost of information query and statistics, supports the high-efficiency and highquality construction of the project, and achieves the expected construction effect of the project.