Wall surface system capable of freely inserting panel or installing lamp strip and installation method of wall surface system

The invention discloses a wall surface system capable of freely inserting a panel or mounting a lamp strip and a mounting method of the wall surface system. The wall surface system comprises an original wall surface, an embedded part, a square tube, a six-shaped connecting piece, a base layer plate and a veneer, the embedded parts are arranged on an original wall face in the horizontal direction and the vertical direction, the square pipes are arranged on the outer side of the original wall face side by side in the vertical direction through the embedded parts, the six-shaped connecting pieces are arranged on the square pipes on the outer side of the original wall face at intervals, and the base layer plates are arranged between the adjacent six-shaped connecting pieces in an attached mode. The veneer is arranged between the adjacent six-shaped connecting pieces in a clamped mode and located on the outer side of the base plate, an installation clamping groove is formed in the outer side face of the veneer in