Provided are a flat ground and step dual-purpose laborsaving car and a cleaning robot based on the laborsaving car. The cleaning robot comprises the flat ground and step dual-purpose laborsaving car.The flat ground and step dual-purpose laborsaving car comprises a flat ground travelling mechanism, a step travelling mechanism, and a car body. The car body comprises at least four racks. The step travelling mechanism comprises four step climbing rods and a transmission device used to synchronously drive the four step climbing rods. The transmission device comprises a driving motor, a driving sprocket rack mechanism, and a driven sprocket rack mechanism. The flat ground travelling mechanism comprises four travelling wheels and two flat ground travelling motors. The cleaning robot also comprises cleaning shovel mechanisms arranged on two racks on the outermost side of the car body. Each cleaning shovel mechanism comprises a cleaning shovel, a fixing frame, a mounting rod, a first connecting rod, a second connecting rod, a sliding rod, a loop rod, and a cleaning shovel motor driving the cleaning shovel to operate. The laborsaving car and the robot can realize to travel on flat ground and climb steps, and can wipe out stubborn spot through the cleaning shovels.