Method of controlling power in an electrical and electronic product for vehicles

PURPOSE: A power control method of electric and electronic products for a vehicle is provided to ensure stable operation of a system by continuing the operation without rebooting in case of instant outage of power. CONSTITUTION: A power control method of electric and electronic products for a vehicle is as follows. A first power source is provided to electric and electronic products for a vehicle so as to perform an operation(S201). When the first power source is not provided, a second power source is provided(S202). The finishing work for the operation is executed with the second power source and the re-supply state of the first power source is checked(S203,S204). If the first power source is provided again, the operation is resumed and continued after the finishing work is completed(S205).