The real estate management system of Beijing Metro Line 5 constructs the basic geographic information database of subway real estate assets with basic geographic information data such as terrain data, geographic data, subway line data, satellite remote sensing image data and three-dimensional model data. At the same time, the system integrates the thematic data and documents of rail transit such as parcels, stations and sections, provides a resource sharing window for all kinds of users, and provides accurate and effective statistical information for management and decision-making.