Today's urban high-rise buildings, including schools, scenic spots and other public places, there are a large number of stairs need cleaning staff to clean. At present, although there are many sweeping equipment, the equipment for sweeping stairs is in a blank state. We have designed a stair sweeping robot. This product is mainly composed of four parts: based on the control technology of STM32f103 single chip microcomputer, four groups of McNamee wheels. Motion system, cleaning suction system, alarm system. Our equipment can solve the problem of cleaning stairs well, fill the gap of cleaning stairs in the current sweeping robot, reduce the use of a lot of manpower and material resources, and greatly improve the efficiency of cleaning work. The main principle is that the robot cleans two steps at a time, in which the motion mechanism realizes the normal operation of the revolution and rotation of the wheel set through the power-on adsorption and power-off disconnection of the electromagnetic clutch. The upper step uses a movable brush roller to sweep the garbage to the lower layer, and the lower layer uses two disc brushes to gather the garbage, and then all the dust and garbage are sucked into the garbage storage bag from the suction port to achieve the purpose of cleaning and greatly improve the cleaning efficiency. The mechanical structure of this work is compact, high operating efficiency, low energy consumption, low noise, strong applicability, wide range of use, and small impact on the environment. Its innovation lies in the ability to clean the stairs independently, mainly in the use of electromagnetic clutch to realize the separation of the revolution and rotation of the wheel set, and through the belt drive, the McNum wheel is driven to realize the translation on the stairs. And the use of STM32f103 and other advanced control module, can be controlled by mobile phone app. The robot will interact with the upper air station through the Internet of Things, and can reflect the situation to the upper control station in the first place in case of failure or emergency. Using mobile phone app to control and monitor data, when the instruction is input, it will work by itself, and when there is a problem at work, it will alarm the mobile phone control terminal, which is safe and efficient.