Early detection and early treatment is the development direction of breast cancer prevention and treatment. Vigorously popularizing the knowledge of early breast cancer detection and diagnosis and widely carrying out breast cancer screening and women’s self-examination can improve the survival rate of breast cancer and reduce the mortality rate. 1. Detecting early-stage cancer to minimize the emergence of late-stage cancer, regular breast cancer screening is an effective way to detect early-stage cancer. The means of screening is regular molybdenum X-ray examination, which can detect clinically asymptomatic breast cancer or breast cancer with no clinical lumps. Experienced doctors can detect early breast cancer through clinical physical examination of the breast, combined with mammogram and color ultrasound screening of the breast. 2. Carefully inquire about the high-risk groups with breast cancer susceptibility factors, such as family history of breast cancer, early menarche (less than 12 years old) or late menopause (more than 50 years old), those who have not given birth, not breastfeeding, or those who have given birth too late, those who have suffered from cancer on one side of the breast, and those who have filled in the breast with inappropriate substances for breast augmentation. 3. Any abnormality of breast should be identified: nipple overflow, especially bloody overflow; limited thickening of breast glands; nipple erosion which is ineffective after repeated local treatments; limited pain of breast; unexplained edema of areola skin, nipple retraction, and limited concavity of breast skin, etc. The causes should be carefully identified. In addition, enjoying breastfeeding, avoiding abortion, avoiding alcohol, controlling body weight, not abusing health care products, appropriate low-fat and low-sugar diet, exercise (swimming, etc.), emotional regulation and maintaining an optimistic mindset can, to a certain extent, prevent the occurrence of breast cancer.