Abstract:First, the article proposes that the influential factors of professional virtual community member innovation are social needs, the need for attention, self-actualization needs, and the degree of community connection. Then, the opinion leaders were identified through social network analysis, and member network relationships were built around the opinion leaders. The network was divided into middle layer, marginal layer, and opinion leaders. Secondly, analyze the motivation of members "innovation behavior based on the members" network relationship and the influencing factors of innovation. The study found that the closer the members are, the more conducive to innovation; the middle layer near the opinion leader shows social needs; the edge layer far from the opinion leader shows the need to get attention; compared with the lost members, the remaining members show self-fulfillment needs which has led to innovative behavior.