That is, the third identifier 5 first determines whether the license plate of the vehicle is blocked. When the license plate is determined to be blocked, the vehicle is recorded as a vehicle with a blocked license plate; and when it is determined to be not blocked, the second identifier 3 then determines whether the vehicle information is consistent with the standard vehicle information recorded in the vehicle information base. When the vehicle information is consistent with the standard vehicle information recorded in the vehicle information base, the vehicle is recorded as a normal vehicle; and when the vehicle information is not consistent with the standard vehicle information recorded in the vehicle information base, the first identifier 2 then determines whether the license plate number of the vehicle is tampered. Thus, vehicles with a blocked or tampered license plate, or a normal vehicle can be identified very precisely and fast.

In an exemplary embodiment of the disclosure, the apparatus for identifying license plate tampering may further include an alarm which alarms a worker, such as a traffic policeman, around the vehicle when the first identifier 2 determines that the license plate of the vehicle is tampered. Obviously, the alarm may also alarm a worker, such as a traffic policeman, around the vehicle when the third identifier 5 determines that the license plate of the vehicle is blocked. In an exemplary embodiment of the disclosure, the alarm may be implemented as a DSP chip or an embedded chip. However, the alarm of the disclosure is not limited thereto, but may also be any other device or alarming circuit that can send an alarm message.