The COVID-19outbreak has taken a huge toll on society and the economy, as well as onpeople's Daily lives. Recently, the global epidemic has repeatedly caused humantension. How to use big data and AI technology to timely perceive and warn thesigns of emerging infectious diseases and improve the sensitivity, timeliness,and effectiveness of public health monitoring has also become a serious issuefor the industry.？Big data refersto the collection of data that cannot be captured, managed, and processed byconventional software tools within a certain period of time. It is a massive,high-growth, and diversified information asset that requires a new processingmode to have stronger decision-making ability, insight and discovery ability,and process optimization ability. The research on big data and public health isalso an emerging interdisciplinary subject in recent years. It is necessary tointroduce big data in the field of public health. Big data can not only bringhuge economic benefits to relevant institutions, but also bring huge socialbenefits, and help maintain social order and ensure national security. Theprediction of diseases, the research, and development of medical products, thediagnosis and treatment of various diseases, and the management of citizens'health undertakings can all play an irreplaceable role.？In this course,we will discuss the concepts, goals, directions, challenges, and applicationsof big data and ai based on it, and demonstrate how big data and AI can be usedto solve a wide range of problems in healthcare.