In recent years, the increasing popularity of social media has provided a platform for consumers to publish their views and experience of a product or service, which is also known as UGC (User-Generated Content) that contains a wealth of products or service feedback information [1–۳]. Correspondingly, by analyzing the user-generated content, enterprises can gain access to valuable information such as product competitiveness, quality, price, niche market and its change, which provides decision support for enterprise product or service [4–۶]. The research on extracting product and market information from user-generated content has been attracting more and more attention [7–۹]. However, the massiveness, heterogeneity, data scarcity and other characteristics reflected in the user-generated content [10–۱۲], combined with the problem of how to extract effective information therein, transform them into knowledge, integrate them to the enterprise’s existing knowledge management system and apply them to product and service innovation, have become a new challenge [8, 13, 14]. This paper is aimed at proposing a systematic solution to achieve product innovation knowledge integration management based on usergenerated content in multi-agent interaction environment [15–۱۷]. The main contributions as follows: (1) Propose U-IMIIK model for interactive innovation knowledge integration management based on user-generated content; (2) Propose an intelligent knowledge expansion method based on open source knowledge interaction and apply it to interactive innovation of smart phone products.