Engineering supervision monitoring system based on BIM

The invention discloses a BIM-based engineering supervision monitoring system. The system comprises a shell, a connecting shaft and a seam width measuring device, wherein a fixing frame is arranged on the side wall of the shell; scales are arranged on the connecting shaft, one end of the connecting shaft is rotationally connected to the shell, and an angle measuring piece used for detecting the rotating angle of the connecting shaft is arranged in the shell; the seam width measuring device comprises two measuring rulers, the two measuring rulers are rotationally connected to the connecting shaft through a hinge shaft, a sliding block is arranged outside the measuring rulers in a sleeving mode, and a connecting assembly is arranged on one side of the sliding block; an initial positioning device is arranged between the sliding block and the connecting shaft; a liquid level detection device used for detecting the vertical descending height of the sliding block relative to the foot position is included, one side