External reforming type molten carbonate fuel cell system

PURPOSE: An external reforming type molten carbonate fuel cell system is provided to reduce an excess of air flow for removing heat generation of a stack by using the heat in a reforming reaction and to decrease power consumption of a fuel supply apparatus. CONSTITUTION: An external reforming type molten carbonate fuel cell system comprises a reforming gas supply device(20) for supplying reforming gas; a reforming reaction device(10) for performing reforming reaction by receiving the reforming gas from the reforming gas supply device; a fuel electrode/reforming catalyst for performing reforming reaction by receiving the reformed gas from the reforming reaction device; and a heat exchanger-I(40) for heating the fuel gas provided to the fuel electrode/reforming catalyst.