Supporting frame structure for installing solar cell module plates and incidental facilities on a house roof is provided. The supporting structure has a shape of pluralities of slope structure accompanied with cleaning accesses mounted on a rectangular cube frame. Side view of the slope structure forms a rectangular triangle on a square. The angle between the sloped top surface and the horizontal base is 3 to 75 degrees depend on the latitude of the geometric location of the place where the solar cell plate modules are installed. The maintenance access is a space through which a worker easily access to the solar cell module plates to clean the surface thereof and to replace the plates.