The application provides an ROV (remotely operated underwater vehicle) which comprises a body, a power unit and a beacon unit, wherein the body is provided with a camera shooting unit and a control unit; the power unit is arranged on the body; the beacon unit is worn on some part of a user body; the beacon unit is configured to emit a plurality of optical control signals with different degrees ofbrightness; the control unit is configured to control the power unit to make a corresponding response according to the optical control signals acquired by the camera shooting unit, so as to regulate the movement posture of the body. Additionally, the application also provides a control method of the ROV. According to the ROV and the control method thereof, the corresponding movement can be performed by receiving the optical control signals transmitted externally, so that the functions of spot hover, automatic tracking, floating upward, diving, overlooking, looking upwards, left-handed rotation, right-handed rotation, advancing, retreating and the like are achieved, and the phenomenon of winding when in control with a cable is avoided.