For many types of glass curtain wall glass, insulating glass, tempered glass, coated glass, laminated glass, glass (LOW-E)... The surface of the glass can be coated, the formation of coated glass (also known as heat reflective glass, can be 1 / 3 about solar absorption and reflection off the air conditioning costs, reduce indoor). Hollow glass in the glass curtain wall has been widely used, it has excellent thermal insulation, heat insulation, sound insulation effect. In order to reduce glare and heat radiation glass curtain wall, should use the low emissivity coated glass. Oxidation easily because of the metal coating layer is coated glass, single use, can only be used inside the insulating glass and laminated glass. At present, high transparent silver low radiation (LOW-E) glass has been used in the curtain wall engineering, it not only has far infrared reflectivity good light transmittance, high energy efficiency, and excellent performance, especially suitable for cold area. It can make more solar radiation entering the room to increase the indoor temperature, also can make the cold season or rainy days from the indoor objects' radiation reflected back to the room 85%, effectively reducing energy consumption, saving energy. Low radiation glass because of its characteristics of high light transmission rate, can be used in any region with high permeability appearance of the building, to highlight the main features of natural lighting, which is currently more advanced green glass.