By using Baidu index to obtain data on the netizens' search and media coverage of breast cancer diagnosis and treatment health information, the paper analyzes the characteristics of public network attention from dimensions of time distribution, group characteristics, related search terms, contents and sources of top news, etc. Results show that netizens pay attention to the early symptoms and prognosis effect of breast cancer, and the attention increases with the incidence of breast cancer. The media often release news about breast cancer pathogenic factors, treatment methods, prevention and health care, and the topics covered are related to the breakthroughs in breast cancer prevention and treatment.