Robot for cleaning stair steps and guardrails and cleaning method thereof

The robot comprises a machine body, the left side face, the right side face and the top face of the machine body are each provided with a camera, the front side face of the machine body is fixedly provided with a movement supporting arm, and the rear side face of the machine body is fixedly provided with a stair cleaning arm and a stair handrail cleaning arm; a wheel-leg type movement mechanism is installed at the bottom of the machine body, and a power source and a controller which are connected with the movement supporting arm, the stair cleaning arm, the stair handrail cleaning arm and the wheel-leg type movement mechanism respectively are arranged in the machine body. The invention further discloses a cleaning method of the robot. And during cleaning operation, the cleaning operation is completed from the top layer to the bottom layer. According to environment information and operation requirements fed back by the camera, the gait of the wheel-leg type movement mechanism of the stair cleaning robot is cal