The heat-insulation performance of the building envelope with sing-layer plate glass, double-layer plate glass and hollow glass microsphere (HGM) thin film as well as the heat conductivity coefficient and heat-insulation performance of HGM thin film were analyzed, and a simulation software DOE-2 was used to calculate heatinsulation performance of buildings in this paper. The results show that the buildings and window glasses coated with HGM can efficiently decrease the room temperature, and the outer wall with HGM can decrease the room temperature, too.