With the advent and rapid development of the big data era, the results of the information age have highlighted the importance of big data analysis. The analysis of big data means that analyzes and process huge amounts of data with the various kinds of innovative ways, in order to obtain great value of products and services or deep insights and data processing methods. Big data brought great opportunities and challenges for public opinion research. It has changed the technology of grasping public opinion as well as a wider range of public opinion collection, which dealt the data in more effective way with "content + relationship" multidimensional research way of thinking. This will make the use of public opinion analysis reached a new depth, at the same time, the credibility and rational utilization of public opinion analysis in the technology of mature and perfect also faces the challenge.