“In the field of architecture, a point cloud based intelligent detection method for multi-scale quality of prefabricated composite panels has been proposed. This method automatically locates and segments point clouds through machine learning algorithms, maps point cloud data into two-dimensional images, and uses image feature detection algorithms to achieve automatic detection. The verification test shows that this method can comprehensively and accurately complete the quality inspection of prefabricated composite panels' factory dimensions, improving the scientificity and accuracy of the inspection.”