The paper analyzes the function of electronic health records (EHR) in prevent life-style disease, proposes several methods on using EHR to prevent life-style diseases, including defining risks on personal life-style diseases, realizing bilateral information exchange for personalized health activities intervention and health education promotion,then discusses the challenges to EHR research in China, namely, the research contents need to be broadened, the research depth need to be strengthened, public health information literacy should be improved