Abstract
Interact network of netizens is a good way to describe social community status. It not only keeps the number of word-of-mouth, but also shows how netizens interact each other. The purpose of this article is to develop a methodology for measuring this kind of network and to explore its relationship with sales. The thesis is that using the eWOM data of top 60 sales car on Mobile01 forum with crawler technique for building internet users’ interact network. The main contribution is to take advantage of the indicators of social network analysis to measure this network structure and find that network sizes moderates the relationship between interact network’s structure and sales.