In this paper, we use GARMIN GPS Ⅱ receiver to receive the data of satellites. Moreover, we are also combined GPS and Arc View GIS by Track GPS's outside model. In deed, using this system we can indicate the location on the electronic map. On the electronic map aspect, we develop data by Are View geographical information system. Those data include the information of roads and the information of some other different scenes. Furthermore, we develop the data into the attribute by coping with photos and digitize street in order to get the length of the road for best routing. After real road testing, we found there were several weak points so we did some more researches and experiments to improve the electronic map and make it more perfect. Besides we interpolate best route earthy by appropriate volume. Interpolate volume earth, not only let best route have more different choice, but also enhance the electronic map improvement.