Nowadays people attempt to replace petrochemical engine vehicles by electric vehicles. However, up to now this attempt has not been successful yet for the insufficiency of safety, cruising range and convenience. When the electricity of battery is used up, the electric vehicle has to stop running and wait for charging and looking for charging stations, always make consumers give up the idea of buying electric vehicles. We have creatively design a range-extending, charging, and driving apparatus for an electric vehicle. It makes use of the clever configuration of wheel motor and planetary gear assembly, which can increase the cruising range, torque and speed of electric vehicle, and conduct charging while driving, and provides the auxiliary power fuel cell with the fuel of oxygen. Here electric vehicles cover all kinds of electric vehicles.