Abstract: Open innovation in the Internet era has gradually become a trend that poses challenges for corporate intellectual property management. The paper takes the Internet and the open innovation environment as the research background. Through the cross-case study of Haier, Tesla and Xiaomi, and from the two dimensions of time and the degree of interaction, the influence process model and the influence hierarchy model are proposed. Then we analyze three elements of intellectual property in the new environment: intellectual property strategy formulation, innovation resource allocation and intellectual property value enhancement. It aims to provide guidance for exploring the modes and mechanisms of intellectual property management in an open innovation environment under the Internet, and to provide ideas for enterprises to conduct intellectual property management in a new environment.