This research is about the way to control noise of the automobile powertrain actively. In earlier days, the physical ways for minimizing the friction or passive ways such as using vibration absorber were applied to reduce noise caused by engine speed. However, these ways have had economic and technical limits to be applied at high-performance powertrain. This paper proposed the real-time way that can optionally extract dominant engine noises and eliminate them. The speaker generates wave that has reverse phase of particular noises which the passenger experiences. Then the real-time noise cancelation operates by overlaying the noise and the wave. It was also verified by automobile-running tests.