Abstract: Abstract: The open innovation paradigm brought forward by Henry Chesbrough offers a new way of thinking and managing about innovation. But the openness and management are different for enterprises of different industries in a different phase of innovation. The key external innovation factors in product innovation, process innovation, and platform innovation for enterprises of different industries are analyzed based on the U-A dynamic pattern of innovation. A dynamic pattern of open innovation is established according to the state-of-arts using a step regression analysis. The research manifests that in the phase of product innovation, enterprises in STI industries should open to few selective factors in order to facilitate the innovation performance, enterprises in DUI industries that open to multi-agency may be good for the innovation performance. Enterprises rely more on internal technological capabilities and cumulated experience of employees in the phase of process innovation. The cumulated technological capabilities and the integrating capabilities of technology and market are key factors for success in the phase of platform innovation.

Key words: open innovation, U-A model, innovation factor, dynamic model