In the process of charging the remote mobile device such as UAVs with the laser as an energy carrier, a twodimensional laser beam scanning and tracking system based on four quadrant detector was manufactured to ensure that the receiving end can accurately receive the laser beam emitted from the transmitting end. The twodimensional scan and tracking system measures the offset of the spot center of the incident laser beam relative to the center of the fourquadrant detector at all times, uses the monitoring and control computers, the control cabinet and the twoaxis turntable to construct the closedloop control system to realize the laser tracking of the target. Test results show that the tracking system can track the moving target accurately in real time when the moving target moves at a speed of no more than 5cm/s in the area of 30cm wide and 1m high from the laser beam emitting end.