Abstract: With the continuous development of real 3D construction in China, city management is developing towards systematical, refined and digital. The floor and house 3D model of buildings can carry more detailed and accurate attribute information, and can render scene together with real three dimensional models, which can better serve the three dimensional management of city real estate and digital governance. Based on the background of "Xiaoshan district digital empowerment social governance" project construction, this paper discusses and realizes the key technology of building floor and house 3D modeling based on real estate registration data,forms technology in the manufacturing process which starts from the whole spatial multi-source heterogeneous data collection to floor&house 3D modeling of building all over the city,this technology can effectively provide technical support and data base for city real estate 3D management,digital enabling and social governance.

Key words: real estate, floor and house, 3D modeling, coordinate correction, semantic matching