Abstract: Based on the exploratory case study method, this paper discusses the implementation context, implementation path and effect of open innovation. On the basis of in-depth analysis of the dynamic evolution of innovation context, open innovation and innovation ability, this paper tries to construct an integrated analysis model of "innovation context - open innovation - innovation ability". According to this research framework, the paper makes a longitudinal case study of Haier Group, which is representative in open innovation from 2009 to 2018. This paper enriches the core of open innovation, and interprets the connotation of open innovation from three aspects: node, transaction logic and type; defines the types of open innovation from eight dimensions: driving force, open node of innovation chain, transaction logic, knowledge flow, involved innovation resources, communication mode, communication frequency and core characteristics, which concludes IDOT, DPOT, DPCT and CCCT. The results show that the innovation context reflected by technological control and innovation activity is the basis for the choice of open innovation mode. Open innovation is a continuous and dynamic process of attracting, integrating, utilizing, releasing and diffusing innovation resources according to the environment and strategic choice of enterprises. As the innovation situation becomes more and more favorable, the open innovation goes through four stages: IDOT, DPOT, DPCT and CCCT, and innovation capability evolves along the path of "technological innovation capability-integrated innovation capability-ecological innovation capability". The theoretical contribution of this paper is that it enriches the core of open innovation, defines the types of open innovation, and puts forward COC model based on innovation context, dynamic evolution path of open innovation and innovation capability, which provides theoretical support and practical guidance for enterprises how to implement open innovation.