The invention provides a wall surface controller and a smart home system, the wall surface controller comprises a seat body, a touch sensing assembly and an insulating plate, the seat body is provided with an accommodating cavity and an opening communicated with the accommodating cavity, and the touch sensing assembly comprises a panel and a touch sensing plate used for sensing that a user touches the panel. The insulating plate covers the opening, the touch sensing plate is supported on the face, facing the containing cavity, of the insulating plate, the panel is installed at the end, provided with the opening, of the base body, and the panel is located on the side, back to the containing cavity, of the insulating plate. When in use, the touch sensing plate is supported and fixed on the seat body through the insulating plate, so that the touch sensing plate does not need to be adhered to the panel, a maintainer can quickly detach and open the panel, and the panel is convenient to replace. Moreover, after a maintainer opens the panel in an electrified manner, the insulating plate can prevent the human body from touching the touch sensing plate, so that the electric shock danger can be prevented, and the safety is high.