The vacuum glass developed by the Japanese Plate Glass Company is a vacuum layer of 1/100 atmosphere with a 0.2 mm interval between two sheets of glass with a thickness of 3 mm. The layer is supported by a small metal cylinder to prevent the external atmospheric pressure from causing the two Pieces of glass are pasted together. The thickness of this vacuum glass is only 6.2 mm, which can be directly installed on general window frames. It has good heat and sound insulation effect and is suitable for windows of residential houses and high-rise buildings.