Ship and air supply system thereof

The utility model provides a ship and an air supply system thereof. The gas supply system comprises a storage tank, a gasification mechanism and a heat exchange mechanism. Liquid fuel is stored in the storage tank; the gasification mechanism is arranged at the downstream of the storage tank and is used for receiving and gasifying the liquid fuel; the gasification mechanism is connected with the engine so as to provide fuel for the engine; the heat exchange mechanism comprises a first heat source channel and a medium channel which can conduct heat exchange. The first heat source channel is arranged on the downstream of the engine to receive tail gas of the engine. An intermediate medium is arranged in the medium channel, and the temperature of the intermediate medium is lower than that of the tail gas for heat exchange; the intermediate medium is water; an outlet of the medium channel is connected with the gasification mechanism, and the intermediate medium with the temperature increased is conveyed into the g