Device and method for monitoring bridge swivel

The invention relates to a bridge swivel monitoring device and method, and relates to the technical field of bridge swivel construction. One end of the mounting frame is rotationally connected with the end part of the swivel beam, the other end of the mounting frame is connected with a reference structure, the rotating surface of the mounting frame is perpendicular to the moving surface of the swivel beam, and the mounting frame can rotate to a symmetrical position relative to the moving surface of the swivel beam when being located at an observation blind spot; the monitoring mechanism is used for being arranged below the swivel beam and matched with the reference structure so as to obtain position information of the reference structure in the rotating process of the swivel beam. When in an observation blind spot, the mounting rack rotates to a symmetrical position relative to the moving surface of the swivel beam, and the intervisibility condition is good, so that the problem that the intervisibility condit