In recent years, the emergence of new technologies, such as “internetwork”, “the Internet of things”, “cloud computing”, has overthrown the business model of traditional cultural industries. It promotes the utilization of Internet connectivity and open logic, and contributes to implementing the strategy of platform business model of cultural industries. Under the background of the “Internet+”, this paper analyzes the process of value creation of platform business model of cultural industries from four aspects, including value proposition, value creation, value delivery as well as value realization. Michael Porter’s Five Forces Model is applied to explore the innovation motivation of the platform business model of culture industries.