In order to change the current situation of artificially cramming the wall of the high-rise building to improve the painting efficiency and reduce the labor intensity, a robot that can be used for spraying the exterior walls of high-rise buildings is designed. The painting robot adopts the vacuum adsorption principle, adsorbs on the vertical wall surface, and walks through the crawler belt. Use remote image transmission and remote control to achieve the purpose of spraying the exterior walls of high-rise buildings.