The Filmonitor6110 is used to measure the spectrum transmittance of glass in Low-E line, which not only can be installed at the position after washing, but also can be installed in vacuum chamber. It can inspect quality and uniformity of float glass and can monitor the color changes after each coating in vacuum chamber. It is significant for Low-E coating monitoring，especially for double and triple Low-E coating. Filmonitor6110 could measure spectrum on each layer of films so as to strictly control over the color and performance of Low-E glass. To get high quality coating, the system monitors spectrum curve of each layer of film, compare them with the target curve and find difference, thereby to guide technicians to adjust coating techniques, realize overall quality management.