Laying system and building construction robot

The invention provides a laying system and a building construction robot, and relates to the field of building construction equipment. The laying system comprises a base, a pickup piece, a fixed camera and a movable camera; the base extends along the length direction; the picking piece is used for picking up a to-be-mounted floor and releasing the to-be-mounted floor to a to-be-mounted area, the to-be-mounted floor is adjacent to the edge of the mounted floor, and a mounting gap is formed; the fixed camera is fixed to the end, in the length direction, of the base and used for obtaining the gap of the end of the installation gap. The movable camera is movably arranged on the base, and the movable camera moves to different corresponding positions according to the to-be-installed floors of different lengths so as to obtain the gap of the end of the installation gap. The movable camera moves to change the distance between the movable camera and the fixed camera so as to adapt to floors with different lengths, so