From a viewpoint of energy saving and environmental problem, a LNG fueled ship is noticed in the marine field. The LNG (Liquid Natural Gas) is needed to vaporize in the ship. In order to develop of the energy omission equipment for the LNG fueled ship, we have discussed to apply a Stirling engine generator system using exhaust gas of the Diesel engine and cold energy of LNG. In this paper, we discuss about the basic structure of the system, and report the previous test for the application with two Stirling engine generators.