A cleaning robot including a processor, a first sensor and a second sensor is provided. The first sensor and a second sensor are disposed on one side of a machine body of the cleaning robot. The processor executes a plurality of operation including: when the cleaning robot operated in an automatic charging mode, controlling the cleaning robot to move forward, and determining whether an optical signal transmitted from a charging station is sensed by the first sensor and the second sensor; when the first sensor senses the optical signal, determining the cleaning robot is located in the light emission range of the optical signal; when the second sensor senses the optical signal, determining the one side of the cleaning robot faces a charging station; controlling the cleaning robot to move forward, so that the power receiving portion of the cleaning robot contacts a power supply portion of the charging station.