Unmanned ship retracting and releasing system and retracting and releasing method

The invention discloses an unmanned ship retracting and releasing system which comprises a wave compensation device installed at the bottom of a suspension arm, the bottom of the wave compensation device is connected with a retracting and releasing device, the retracting and releasing device comprises an automatic locking device, an unhooking device and a grabber device, the bottom of the automatic locking device is connected with the unhooking device, and the outer side of the automatic locking device is connected with the grabber device. The wave compensation device can reduce the influence caused by waves, the grabber device can generally fix the position of the unmanned ship when the unmanned ship is recycled, and the influence of sea conditions on the unmanned ship is reduced; the automatic locking device can automatically release the unmanned ship when the unmanned ship is placed on the sea surface, so that the unmanned ship can stably enter the water, and the damage to the unmanned ship caused by too e