Bending Plate weighing system consists of weighing pad in front of toll lane and other detecting devices. This is able to acquire vehicle data and transfer it to computer. Then the road toll charge will be calculated according to the acquired information of vehicle weight and type etc. Mainly applied to vehicle weight detection on highway and Bridge, Bending sensor can observe overrun vehicles and weighing charge system can be built according to the test result. This can be widely use in Traffic Research to promote Highway Construction and Modernized Management.