Retrieval behavior of network users reflects the user's information needs at a certain extent. The paper reviews the research on health information users as well as the status of information retrieval of users, 17 key words on health subject are selected, the characteristics of users in Chongqing as well as their attention for the keywords are analyzed using Baidu Index. It points out that we should strengthen reporting the key subjects in the construction of "Healthy Chongqing", so as to satisfy the user needs.