The traditional floor sweeping robot will be replaced by an intelligent, autonomous floor cleaning robot. Aiming at the fact that the traditional robot cannot clean the three-dimensional position, an intelligent cleaning robot is designed for stair cleaning, which integrates vacuuming and mopping. Using three sections of lifting structure to climb the stairs, the Mecanum wheel can realize the lateral movement of the three-side cleaning robot on the stairs, the bottom is equipped with infrared sensor, to ensure that it can not fall down the narrow stairs. The robot can better save the manpower and material resources of cleaning stairs, so that the sweeping robot is more widely used.