Abstract: A driver's license being IC-carded, informations stored in the driver's license card is read out to detect matched or mismatched relations with a driver's license number set beforehand. The excess of penalty points of violation, uninsertion of the card, etc., and the permission and prohibition of starting an engine are decided on the basis of the result of the detection. Besides, the information stored in the driver's license card is made rewritable by using a keyboard and others provided in a driver's license card controller which is installed in a government office administrating driver's license, such as a police office, and thus the quick renewal and alteration of driver's license are enabled.