An electronic license plate is composed of a display screen, a photosensitive probe, an identification chip, a power source/data port, a base and a reader-writer. The displaying brightness of the electronic license plate is automatically controlled through the brightness of the outside world, when the brightness of light rays of the outside world is large, the displaying brightness is large, and when the brightness of the light rays of the outside world is small, the displaying brightness is small; meanwhile, the electronic license plate is provided with a built-in chip for storing informationto record the information such as vehicle modes and years, and a relevant department can read the information through a special device in momentary and wireless modes; the displayed content can be read, written and changed only through a special module of the authorized relevant department; the electronic license plate is mounted on the base fixed to the license plate position; and the electroniclicense plate can be integrated to a vehicle body at the same time and becomes an inherent component of a vehicle.