NOVELTY - The connection (200) has an emergency air connection shutter board that is provided between suction shutoff valve (100) and fan (300) along air intake line of fuel cell system or between outlet shutoff valve (500) and humidifier (400) along air outlet spacer. A cable is connected with emergency air connection shutter board. An operation component enables fluidic communication of air intake line or air outlet spacer with outside environment by drawing a cable to break shutter board, if suction shutoff valve or outlet shutoff valve does not work properly.    USE - Emergency air connection of fuel cell system (claimed) used in vehicle. Uses include but are not limited to motor car such as passenger car, comfort jeep and sport utility vehicle, bus, truck, commercial vehicle, water motor vehicle such as boat and ship, aircraft, hybrid fuel cell vehicle, electric fuel cell vehicle, vehicle with combustion engine, plug in hybrid electric car, vehicle with hydrogen pulsation and vehicle with alternative fuel.    ADVANTAGE - The fuel cell is started, in which the emergency air connection is opened in emergency to ventilation, when suction shutoff valve or outlet shutoff valve of fuel cell system does not work properly. The air shutoff valve at specific location is easily accessed by person to build and install the valve by hand. The fuel cell system is run in emergency operation to repair shop by emergency air connection shutter board that is removed by simple operation of operating assembly so that the towing process of vehicle is eliminated, to save time and money of driver. The repair costs are saved, when the board is removed and shutoff valve is not working properly.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a fuel cell system; and    (2) a method for operating fuel cell system.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of the fuel cell system with emergency air connection. (Drawing includes non-English language text)    Suction shutoff valve (100)    Emergency air connection (200)    Fan (300)    Humidifier (400)    Outlet shutoff valve (500)