Currently，there is little study focused on “Weibo+Web” communication mechanism under social media. Based on the function of Shanghai Bureau of Quality and Technical Supervision，this project employed public opinion monitoring & analyzing system to collect data from Weibo and other media，combining with current social media environment. Besides the big data from kinds of media，3 cases were also further analyzed to illustrate the creative “Weibo+Web” communication mechanism and its incomparable function. In this way，we can apply and promote the mechanism to not only our system，but also other related institution or organization.