NOVELTY - The method involves calculating an available power which is currently used in a vehicle and calculating a motoring request power of a driving motor (40) by a controller, based on the calculated available power and power required in the driving motor. The stack request power required in the fuel cell is calculated based on a required charging request power and the calculated motoring request power, depending on a state of charge (SOC) of a battery (20). The air supply to the fuel cell (10) is controlled depending on the calculated stack request power.    USE - Method for controlling air supply of fuel cell vehicle. Uses include but are not limited to sports utility vehicles (SUV), buses, trucks, commercial vehicles, watercraft including boats and ships, aircraft, hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and petrol-powered vehicle and electric-powered vehicle.    ADVANTAGE - The reduction in performance due to the drying of the inside of the fuel cell which occurs due to the excessive supply of air is prevented, so that the performance of fuel cell is kept constant during the driving. The air supply quantity is controlled by calculating the power required in the fuel cell stack based on the available power which is currently used in the vehicle and the actually required air supply quantity is calculated, thus reducing the loss occurring due to the excessive supply of air and improving the fuel efficiency of the fuel cell vehicle.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a non-volatile computer-readable medium containing program instructions for controlling air supply of fuel cell vehicle; and    (2) a control unit for controlling air supply of fuel cell vehicle.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram illustrating the electrical connection state of components in fuel cell vehicle. (Drawing includes non-English language text)    Fuel cell (10)    Battery (20)    Motor (34)    Air blower (36)    Driving motor (40)