A intellectual blowing system based on the microcontroller 80C196KC is introduced. The main purpose of the system is to monitor the performance of the electric power engine and realize intellectual blowing in order to remain a good state in the moving process for the electric locomotive and at the same time to avoid locomotive fault when the system behaves abnormally. Then the work principle and the design process of hardware and software are expounded，and the debug procedure as well. Finally, subject control task have also been showed in detail.