It can mimic some of the movement functions of the human hand and the arm, and is used to grasp, transport, or operate the tool's automatic operation device according to a fixed procedure. The robot is the earliest industrial robot, and it is also the earliest modern robot. It can replace the heavy labor of people to realize the mechanization and automation of production, and can operate in harmful environment to protect personal safety. Therefore, it is widely used in machinery manufacturing, metallurgy, Departments of electronics, light industry and atomic energy.