Unmanned aerial vehicle search and rescue method and system based on marine environment

The invention provides an unmanned aerial vehicle search and rescue method and system based on a marine environment. The method comprises the following steps: acquiring a real-time GPS positioning signal returned by an accident unmanned aerial vehicle in real time; determining an accident occurrence position and an accident type of the accident unmanned aerial vehicle according to the real-time GPS positioning signal; determining a rescue position according to the real-time GPS positioning signal, the accident occurrence position and the accident type; controlling the rescue unmanned aerial vehicle to go to a rescue position in a fixed wing state; detecting the current position and current environment information of the accident unmanned aerial vehicle through a dual-light camera arranged on the rescue unmanned aerial vehicle; determining a rescue mode according to the current environment information and the current position; the fixed wing state is adjusted to be a multi-rotor-wing state, and the accident un