China developed several models of painting robot and put into use, and achieved good economic results. Mainly by the robot body painting robots, computers and the corresponding control system, hydraulic-driven painting robot also includes a hydraulic oil source, such as pumps, tanks and motors. Use of 5 or 6 DOF articulated structure, there is a large movement of the arm space, and can do complex trajectory, the wrist is generally 2 to 3 degrees of freedom, the flexibility to exercise. More advanced painting robot arm using a flexible wrist, can bend in all directions, can be rotated, its operation is similar to a person's wrist, can be easily inserted into the interior through a small hole workpiece, spraying the inner surface thereof. Painting robots generally use hydraulic drive, with fast action, explosion-proof performance characteristics, can be taught or the number of points are shown to achieve through hands-on teaching. Painting robots are widely used in automotive, instrumentation, electrical appliances, ceramic and other craft production sector.