Abstract: Point cloud data from large-scale construction sites can be rapidly acquired by oblique photogrammetry and LiDAR technology, which is then fused and registered with triangular meshes or 3D point clouds derived from Building Information Modeling contained readable vertex coordinate information. By comparing the 3D scene of the construction site with the BIM model, differences can be identified to monitor the construction progress. In the construction process of a certain building project, laser scanning was used to acquire three periods of 3D point cloud data from the construction site. The second and third periods of data were focused on for change detection. By comparing the voxel changes between the two stages' models, newly built components from the second to the third period were analyzed, identified, and extracted. The change detection results were clearly marked on the BIM model to precisely identify changes in construction progress. The practical application results of the project showed that monitoring the project' s construction progress through this method helps project managers make more accurate and timely decisions.