In the United States and Europe, low-emissivity (Low-E) (Translation for Lou sense) coated glass because of its superior performance, has been of great concern. Especially in Germany Wschvo regulations so Low-E glass has rapid development. Research on 'Low-E' of European manufacturers are starting laboratory in the late 1960s. 1978 Hollow low e glass, American English Pater (interqane) successfully 'Low-E' glass is applied to the building. Low-E insulating glass for solar radiation 0.3-2.5um has a transmittance of more than 60% of low-e glass, day in much of the radiation energy from outdoor through, but at night and rainy weather low-e glass specification, from the indoor heat radiation about 50% of the object to be reflected back to the indoor low-e glass advantages, only less than 15% of the heat radiation is absorbed by the exchange lost its re-radiation and convection, it can effectively prevent the indoor heat vent to the outside. This feature Low-E glass, it has a one-way flow control heat outdoor effect.