A surface treatment robotic system configured to determine direction references by providing different direction sensors in different surface treatment robots, the surface treatment robotic system comprising a surface treatment robot and a remote control; the surface treatment robot comprises a control unit and a drive unit; the control unit receives remote control instructions of the remote control and controls the drive unit to execute corresponding actions; the surface treatment robot is provided with a direction sensor for determining a reference direction; the direction sensor is coupled to the control unit; and the direction sensor transmits the determined reference direction to the control unit, and the control unit determines a walking direction of the robot by referring to the reference direction and according to the remote control instructions inputted by the input terminal of the remote control.