Through the online survey of the online commentary users，this report analyzed the users' awareness，cognitive features，attitude，engagement and participation characteristics，and explored other influence factors. According to the survey results，traditional and popular media channels have higher awareness of users. “convenient，rich，diverse” has become the endorsement of online commentary，and engagement is highly influenced by concentration of attention. In addition，this report also analyzed the impact of online commentary on users' cognition，behavior and on event development trend.