The research of public opinion data is divided into five platforms and three public opinion fields.

The five platforms are: news website, Weibo, WeChat, forum and news client;

The three public opinion fields are online media public opinion field (mainly news websites), mobile media online public opinion field (mainly news clients) and self-media public opinion field (mainly Weibo and BBS).

On the research object, it can be divided into four aspects: time, place, event and person. We should gradually go beyond the study of news events and topics and reach the study of public mentality and concepts. At the research level, it is divided into three levels: micro, meso and macro. There are more and more micro-attempts to realize the localization and communization of public opinion data.