FUEL CELL SYSTEM AND METHOD FOR CONTROLLING FUEL CELL SYSTEM

The fuel cell system includes a fuel cell including a cell stack configured to have a reforming catalyst for generating hydrogen from hydrocarbon, a first flow path configured to supply a fuel containing hydrocarbon to the cell stack, and a second flow path configured to supply an oxidant gas to the cell stack such that the oxidant gas flows oppositely or orthogonally to the fuel. The control method for the fuel cell system including: detecting a temperature of a discharged oxidant gas that is the oxidant gas discharged from the second flow path; and performing a temperature control of the fuel cell based on the temperature of the discharged oxidant gas.