1. An RFID tag installation system using two CCD cameras, two GPS receivers, an INS, a DMI and a sensor synchronizer, being installed inside and outside of a vehicle, the system comprising: a vehicle position (x, y, z) and yaw extractor by using the two GPS receivers; an orientation (position, attitude) extractor for the vehicle by using INS; a GPS/INS/DMI integrator for GPS outage and for INS error correction in real time or a post-processing stage; a camera interior/exterior orientation extractor for estimating lens distortion, focal length, principle point, and orientation of the CCD camera; a target position extractor for finding 3-dimensional coordinates of a road in which the RFID tag is installed; a road information storage for providing road information such as a speed limit and a rout number of a road in which the RFID tag is installed; a RFID tag writer for inputting 3-dimensional coordinates and road information to the RFID tag; and a RFID tag installer for installing the RFID tag on the road.