Abstract: Maintenance and management of subway facilities and equipment are very important, but the existing system is difficult to meet the needs of enterprises and operators. Low degree of visualization and inaccurate equipment maintenance directly affect operation and management of a subway project. A BIM based asset information management system of subway operation was introduced, a BIM model and information database were established by taking the Nanjing subway as an example, and functions and characteristics of the system were expatiated from the aspects of space management, facility management, maintenance management, asset management and safety management. The innovation of this system is represented by ERP+GIS+BIM innovative management platform, BIM+FM innovative facilities property management mode, efficient electronic work order management, multi-platform and technology integration, combination of BIM + Internet of things.