Fuel Cell using hydrogen is the alternative energy solution appropriate to the locomotive mainly powered by the fossil fuel. This paper has investigated the configuration combined with the hydrogen elecrolysis generator and purifier and PEMFC. For the simplification, commercialized PEMFC is 1kW electric power generator which has the function of grid connected power system. The purity of hygrogen generated by the electrolysis(KOH) was 99.999% being able to prevent from the aging of pemfc. The grid connected hydrogen power generator has proven the good operation to generate 1kW electric power.