The engineering test system and its advanced precision verification system were designed for motor vehicle yaw rate and sideslip angle measurement based on the GPS technology, which were primarily utilized to the systematic winter and summer condition tests for the industrial research of the vehicle dynamic stability control system, i.e. DSC. Additionally, the main data processing methods were also put forth. The structures of the two systems and the test method were firstly introduced in detail, and then the test error of the vehicle azimuth angle, the yaw angle velocity and the sideslip angle were comparatively analyzed according to the same group of test data. The results showed that the positioning error of the test system is greater than the verification system's, but its test precision of the yaw rate and sideslip are in good agreement with the ones of the verification system, so the test system could be employed for the motor vehicle road way test.