In order to keep the light steel houses in different areas warm in winter and cool in summer,energy-saving thermal insulation and heat-proof measures are adopted on walls, floors, ceilings and windows. For example, a 10Omm thick high-performance glass wool or rock wool felt is placed in the ceiling to provide thermal insulation and anti-condensation. The outer wall features a composite wall structure consisting of outer wall panel, glass wool board, air layer, 100mm thick glass wool felt, gypsum board, etc., which has good thermal insulation effect, moisture-proof layer and wall on the surface of thermal insulation material. The inner venting layer prevents condensation on the wall. A layer of concrete floor is elevated , and polystyrene board is laid to block the entry of cold air. The window is made of high-performance insulating glass, sealed window frame, good air tightness, reducing air conditioning cost and saving energy.