The report of the 19th National Congress put forward the grand goal of building “Digital China”. This is the latest strategic deployment made by our party based on systematically summarizing the practical experience，scientific understanding and grasping the laws of development of digital technology in China.The key of big data's value creation lies in the application of big data.Under the research by the cases'tracking research，applied topic analysis，professional media monitoring，experts'interviews and the others，the report contains 4 aspects including the History and Progress of Digital China's Development，the Development of Big Data in Digital China，the Focus of China's Big Data Application as well as the Trends of China's Big Data Application.In addition，combined with the analysis and research on the development and application of big data in China in the past one year especially the contribution of experts of the Big Data Management Professional Committee，this report preliminarily predicts the development trend of big data and forms a corresponding forecast from different perspectives of 2019 and the future.