By collecting data of attention to online health information of hypertension in recent five years via Baidu Index, the paper explores the spatial and temporal distribution rules of attention to online health information paid by its users in ubiquitous networks and population characteristics of these users. It indicates that health information service providers should make more use of mobile terminals to render accurate health information services to specific groups of population and change forms of information organization. Also, it appeals for the participation of professional medical institutions and personnel.