Water area fertilizer application device based on unmanned ship and fertilizer application method thereof

The invention discloses a water area fertilizer application device based on an unmanned ship and a fertilizer application method thereof. The water area fertilizer application device comprises an unmanned ship and a fertilizer application device which is arranged on the unmanned ship and used for applying a fertilizer to a water area to be subjected to fertilizer application, wherein the unmanned ship comprises a main controller, a communication apparatus, a video apparatus, a water quality detector, a tail spray pump system and a storage battery; the main controller is respectively coupled with the communication apparatus, the video apparatus, the water quality detector, the tail spray pump system and the storage battery; and the fertilizer application device comprises a fertilizer storage tank for storing the fertilizer, a scatterer for scattering the fertilizer and a ploughing rake for ploughing soil underwater. According to the water area fertilizer application device based on an unmanned ship and the fer