To provide a road pricing method and its system capable of applying to a wide range area having a plurality of inflow roads.

This road pricing method comprises a license plate reading step (15) for reading each vehicle identification number of vehicles passing through a prescribed area, a vehicle checking step (15) for checking whether or not the read vehicle identification number is of the vehicle whose entry into the prescribed area is admitted, and a charging claiming means (17) for promoting the claim of charging to the owner of the violating vehicle when the read vehicle identification number is not of a permitted vehicle.