China's building energy consumption accounts for about 33% of the country's total energy consump-tion. Doors and windows as an important part of the building envelope is the weakest link of barrier the outdoor and indoor energy. Doors and windows energy loss accounted 50% of building energy consump-tion, which energy loss through glass accounted 75% of Doors and windows. The solar heat and ground heat into the room through the window in the summer increase 73% cooling energy consumption; in winter the loss of heat through the window to the outside increase 58% Heating energy consumption. Ener-gy-saving glass is the key to building energy efficiency. The Passive House Glass makes building the minimized need of building heating and air conditioning.