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Based on the origin of the innovation theory and the technological innovation models of Rothwell, this paper puts forward four-generations of evolutionary models using the firm innovation system: "Internal R&D- Oriented Innovation System", "Internal and External Collaborative Innovation System", "Highly Strategic- Oriented Innovation System" and "Ecological Innovation System". This paper dwells on the characteristics and relationship between each innovation system, and the role in the enterprise innovation especially the State-owned Key Enterprises innovation, so as to provide a theoretical and practical basis for the design and improvement of the State- owned Key Enterprises innovation system.

Firm Innovation Systems: Perspectives of Researches on State-owned Key Enterprises