With the rapid development of China's economy, more and more skyscrapers have been established, and the problem of cleaning the external walls of buildings has become increasingly prominent. The laser cleaning system provides a good solution for cleaning the external walls of buildings through optical fibers. It can Effectively clean various pollutants on various stone, metal, and glass, and it is many times more efficient than conventional cleaning. It can also remove dark spots and stains on various stone materials of buildings.