The cruise control system has become standard equipment for the vehicles abroad, so in our country it is very significant to develop this kind of system and apply it to the home made vehicle. Based on the fuzzy neural network model of vehicle cruise control system, the test of keeping constant speed of engine on the dynamic electronic-load test bench is carried out and the vehicle cruising test on the Santana 2000 with AMT is also conducted. Promising results have been got in both tests. The study paves the way for production of vehicle cruising control system.