Building inspection method and system based on existing building structure

The invention discloses a building inspection method and system based on an existing building structure, and the method employs a point cloud model obtained by a laser radar, has high-precision and high-density three-dimensional space information, can precisely reflect the geometric morphology and detail features of the building structure, and employs image data obtained by an image collection device to achieve the real-time inspection of the building structure. According to the method, the building state can be known more visually, registration fusion is carried out on the point cloud model and the image data, the inspection package contains rich geometric information and visual information at the same time, data collection, registration fusion and evaluation processes are integrated into one inspection package, automation and standardization of the inspection process are achieved, and the inspection efficiency is improved. Compared with a traditional manual inspection mode, the inspection method based on th