This autonomous vehic1e was fabricated with aluminum alloy to decrease the weight of the body. Two driving wheels were installed at both sides of the front end of the vehicle, whi1e two rest wheels were located at the rear end These two driving wheels were powered by a 500W, DC servo motor, respectively; and two 12V, 56 AH batteries were used as the power source. The electronic compass and encoders of the servo motors were employed to guide the vehicle and the ultrasonic sensors were used to detect obstacles for collision prevention. After the vehic1e had been assembled, the ultrasonic sensors, the velocity of the vehicle, the traveling distance, and the turning radius were calibrated first, then the guidance tests for given destinations were conducted. These guidance tests had two kinds, one with obstacles on the path, another one without obstacles. Since the ultrasonic sensors installed were not adequate, the blind area was too big, sometimes the vehic1e would hit the obstacles. For the guidance tests, the maximum error was 77cm, while the minimum error was 0.7cm.