The invention discloses a tripod device. Support legs and a support platform are movably arranged, the height of the support legs can be adjusted, therefore, the problems that in the prior art, tripod legs are long and cannot be disassembled are solved, and the tripod device is convenient to carry; transportation is convenient, the measuring precision is improved, and the service life of instruments is prolonged; by arranging a horizontal detection mechanism, it is guaranteed that the support platform is horizontal, measurement is more accurate, and host erecting, leveling and aligning are convenient; by arranging a position adjusting mechanism, the position of a host can be adjusted in all directions, a laser can be accurately aligned with a measuring point, and the adjusting process is easy and convenient to operate.