Driven by the wave of digitalization，mobility and intellectualization，a new type of news report with multiple advantages-data journalism WeChat Public Account has emerged. This paper selects NetEase “Data Blog”，a typical representative of WeChat Public Account of data journalism，as an empirical research object. From the perspectives of data sources，news content and data visualization and presentation，this paper conducts comparative empirical research on the content of data news in different periods to explore the characteristics of innovation communication. Based on the empirical results，this paper concludes that the role changes of the Data journalism WeChat Public Account news narrative are embodied in：“clinics for the plight of the people”，“trackers for social hot spots”，“the humanistic psychotherapists”，“the observers of teenagers’ fate” and “the artists of perceptual integration”. This paper also puts forward some innovative ideas and optimization suggestions for the systematic reconstruction of data core so as to promote China’s data journalism constantly forge ahead and innovative development. The specific measures are：highlighting the core value of data journalism with “Media Ritualization Operation”，enhancing the audience’s interest in reading data from “aesthetic dimension”，expanding the data production capacity with “Media Extension Theory” and opening the data link password with “all things in disorder”.