Low-E coated glass (Low-E glass) is a kind of glass on which surface several layers of metals(included silver layer) or metallic compounds are sputtered.It has high visible transmission and high reflectance to infrared. Therefore, Low-E glass can supply very good heat insulating performance and meet the requirement of energy saving by preventing overfull solar energy coming into room during summertime and reducing indoor heat loss during wintertime. Furthermore, avaiable various colors can satisfy the decorative requirement of building.