Mechanical engineering is the basic content in traditional industry in China. Especially, the development of mechanical equipment will confine the development of many fields in national economy. The information technology is a frontier subject with rapid progress, and has been penetrated into many domains. This paper discusses how to use information technology to motivate and develop the traditional mechanical engineering from the viewpoint of mechanical product, i. e. mechanical product informatization. The paper introduces in detail the connotation, characteristics and realization steps of informatization. Combining with some achievements in authors' research practice, the paper mainly analyzes information fusion and feature extraction during the process of mechanical product informatization. In the end, the paper proposes that the theoretical breakthrough is essential for assuring autonomous intellectual property and kernel techniques.