Abstract: Based on similology and similarity system theory and principles of similarity engineering，a new concept and type of hybrid integrated design is presented，basic theory and method of hybrid integrated design which can hybrid various new technology and the excellent characteristics information in a systems for similarity mechanical and electrical products systems are studied. The new theory and method of hybrid integrated which is beneficial to constantly bring forth similarity system design technology，as well as advancing systematic hybrid of procession of design and manufacture for new and superiority mechanical and electrical products.

Key words: Similarity system design, Hybrid integrated, Similarity mechanical and electrical products, systems