Underground assembling device and underground assembling system

The utility model relates to an underground assembling device and an underground assembling system.The underground assembling device comprises a supporting assembly, a track assembly and a moving assembly; the supporting assembly is hollow and extends in the first direction, and the upper end and the lower end of the supporting assembly are used for abutting against the top wall and the bottom wall of an underground roadway correspondingly. The track assembly comprises at least three track beams; the at least three track beams penetrate through the upper end of the interior of the supporting assembly in the first direction. The moving assembly is connected to the rail assembly in a sliding mode, has an automatic lifting function and can convey a part to be assembled to a designated assembling position along the rail assembly. The lifting device has the beneficial effects that the stability and the speed of the whole lifting process can be improved, the manual operation is reduced, the underground lifting spee