The invention relates to a lamp box hanging system. The lamp box hanging system comprises a keel, a clamping piece and a hanging component; a lamp box comprises a box body; the box body is connected with the keel through the clamping piece; an adjusting hole is formed in the keel; the hanging component comprises a lead screw and a hanging piece; the hanging piece is respectively connected with the adjusting hole and the lead screw, and is connected with the adjusting hole through a locking piece; when the locking piece is released, the hanging piece can move in the adjusting hole; and when the locking piece is locked, the hanging piece is fixed with the adjusting hole. The lamp box hanging system improves the top surface modeling installation precision of the light box without needing the welding and antirusting treatment, so that the labor cost is lower; the lamp box hanging system needs no professionals for operation, is popular in construction, accelerates the construction speed, and facilitates the standardization operation; in addition, the keel can be fixed through the clamping piece, and can realize any adjustment and displacement in the longitudinal direction; and meanwhile, a box body connecting piece is convenient for installation, so that the combination fixation of the box body can be realized without needing welding.