The invention discloses a construction quality safety supervision method and system based on UWB positioning. The method comprises the following steps: receiving a hidden danger point photo which is uploaded by corresponding mobile intelligent equipment and shot by the corresponding mobile intelligent equipment, and time information, orientation information and shooting parameter information whenthe hidden danger point photo is shot; meanwhile, positioning the UWB positioning tags on the safety helmets worn by each constructor in the field continuously, and calculating the three-dimensional space position coordinates of each constructor in the field in real time. on one hand, the hidden danger type of the hidden danger point is determined by analyzing the content of the hidden danger photo, and on the other hand, the spatial position of the hidden danger point is determined by combining the three-dimensional spatial position coordinates of the constructor when the hidden danger pointphoto is shot and according to the azimuth information and the shooting parameter information when the hidden danger point photo is shot. Therefore, according to the construction quality safety supervision mode provided by the invention, the process of reporting the hidden danger points is simplified, the supervision efficiency is improved, meanwhile, accurate positioning of the hidden danger points can be realized, and subsequent processing of rectification personnel is facilitated.