Taguchi Method was applied to explore aluminum hot dipping onto low carbon steel. Four hot dipping parameters (i.e. operating temperature, time, speed and surface roughness) were concerned. The results indicated that the hot dipping temperature and time are the dominant parameters of the aluminized layer thickness. Besides, the hot dipping time is the dominant parameter of the thickness of external aluminum layer on specimens also. However, the dipping speed and the surface roughness of specimens are not important parameters.