Abstract: When it is judged that a fuel cell stack is drying up, recovery control is performed. In recovery control, the cathode pressure control valve is controlled so that the cathode pressure becomes an increased cathode pressure, a discharge flow rate of air of a turbocompressor is set to an increased flow rate of air, and a bypass control valve is controlled so that a flow rate of air which is fed to the fuel cell stack is maintained at the requested flow rate of air. Furthermore, a combination of an increased cathode pressure and increased flow rate of air for minimizing the amount of consumed power of the turbocompressor required for eliminating dry-up is set based on the requested flow rate of air of the fuel cell stack.