An apparatus for returning of a robot, comprising: a signal transmitter disposed on a charging station to transmit a single front signal and a plurality of distance signals comprising first (311A, 312A), second (311B, 312B) and third distance signals in which a respective transmission distance of the plurality of distance signals consecutively increases; a signal receiver disposed on the robot and comprising a plurality of receiving sensors to receive one among the single front signal and the plurality of distance signals; and a controller configured to calculate an angle of the charging station by using one among the single front signal and the plurality of distance signals as received, and to control the driving of the robot so that the robot returns to the charging station using the calculated angle of the charging station, wherein the controller is arranged to control a driver for the robot to drive away from the charging station when the first distance signal (311A, 312A) is received by at least one among the plurality of receiving sensors provided on the robot, or for the robot to drive toward the charging station when the third distance signal is received, the controller is arranged to control the driver for the robot to perform front-turn driving toward a direction corresponding to a preset angle based on a direction of the charging station and search the front signal when the second distance signal (311B, 312B) is received by at least one among the plurality of receiving sensors, and the controller is arranged to control the driver for the robot to drive toward the direction of the charging station and to connect to the charging station when the front signal is received by at least one among the plurality of receiving sensors. a signal transmitter disposed on a charging station to transmit a single front signal and a plurality of distance signals comprising first (311A, 312A), second (311B, 312B) and third distance signals in which a respective transmission distance of the plurality of distance signals consecutively increases; a signal receiver disposed on the robot and comprising a plurality of receiving sensors to receive one among the single front signal and the plurality of distance signals; and a controller configured to calculate an angle of the charging station by using one among the single front signal and the plurality of distance signals as received, and to control the driving of the robot so that the robot returns to the charging station using the calculated angle of the charging station, wherein the controller is arranged to control a driver for the robot to drive away from the charging station when the first distance signal (311A, 312A) is received by at least one among the plurality of receiving sensors provided on the robot, or for the robot to drive toward the charging station when the third distance signal is received, the controller is arranged to control the driver for the robot to perform front-turn driving toward a direction corresponding to a preset angle based on a direction of the charging station and search the front signal when the second distance signal (311B, 312B) is received by at least one among the plurality of receiving sensors, and the controller is arranged to control the driver for the robot to drive toward the direction of the charging station and to connect to the charging station when the front signal is received by at least one among the plurality of receiving sensors.