System and method for supplying fuel gas for a high-pressure gas injection engine

The present invention pre-cool the various equipment that includes a fuel gas to drive before the system the system can be supplied smoothly to the high-pressure gas injection engine, and the fuel gas supply system and the supply for the high-pressure gas injection engine capable of maintaining the cooled state method relate to. According to the present invention, there is provided a system and method of the LNG as a fuel by using the fuel gas supply system for supplying to the high-pressure gas injection engine from the LNG storage tank supplying the LNG to the high-pressure gas injection engine, it is included in the fuel gas supply system fuel gas for at least one device of the equipment which LNG passes when supplied and cooled using liquid nitrogen, to use the LNG maintaining the cooled state of the at least one device a high pressure gas, characterized in jet engine fuel gas the delivery system and method is provided.