Health literacy is a personal skill that is conducive to healthy decision-making. With the increasing popularity of digital media，more and more people are searching for health information through the network and conducting self-health management，which indicates the arrival of the digital era of health literacy. Digital health literacy covers health literacy and digital skills. The digital health literacy of the elderly in China lags behind the demand for intelligent elderly care. The digital health literacy of the adolescent population is polarized and affected by the level of parents. The digital health literacy of pregnant women is quite high and benefits a lot. The COVID-19 spreading around the world is a special situation to examine people’s digital health literacy. “Digital refugees” are struggling in the social development. China is in the initial stage of digital medicine. To improve the national digital health literacy，we need policy guidance，multi sectoral cooperation，popular science education as a tool，and appropriate technology as a support.