In recent years, the incidence of breast cancer has been increasing year by year, ranking first among women with malignant tumors. Mammography, mammography and breast ultrasound are becoming more and more popular, and major hospitals and specialized hospitals in China have started to align with international standards by applying the Breast Imaging Reporting and Data System, or BI-RADS (breast imaging reporting and data system). It was established in 1992 by the American Radiological Association in cooperation with the American Cancer Center, the American Surgical Association, the American Pathological Association, and the FDA, and is widely recognized by the international medical community. BI-RADS. Diagnostic criteria evaluation classification: BI-RADS-1 level is no abnormality – follow up; BI-RADS-2 level is benign – follow up; BI-RADS-3 level is probably benign – ultrasound review within 3 months, mammography review within 6 months; BI-RADS-4 level is suspicious abnormality, requiring biopsy surgery, inside then three kinds: 4a low malignancy possibility, 4b malignancy may be moderate, 4c further suspicion of malignancy, but not up to level 5; BI-RADS-5 level is highly suggestive of malignancy – surgery. Foreign experience, mammography and ultrasound screening results: most should be BI-RADS. grade 1 and 2. The malignancy rate for surgical biopsy: BI-RADS.3 grade is less than 2%. BI-RADS.4 grade is between 23-30%. BI-RADS.5 grade is greater than 95%. Therefore, our experience is that patients with BI-RADS grade 3 should be closely followed up and treated with appropriate Chinese and Western medicine. With patients with BI-RADS grade 4, the surgeon’s motivation for biopsy should be increased. Especially for grade 4b,4c. In recent years, the incidence of breast cancer has been increasing year by year, and it is the most common malignant tumor among women. Mammography, mammography and breast ultrasound are becoming more and more popular, and major hospitals and specialized hospitals in China have started to align with international standards by applying the Breast Imaging Reporting and Data System, or BI-RADS (breast imaging reporting and data system). It was established in 1992 by the American Radiological Association in cooperation with the American Cancer Center, the American Surgical Association, the American Pathological Association, and the FDA, and is widely recognized by the international medical community. BI-RADS. Diagnostic criteria evaluation classification: BI-RADS-1 level is no abnormality – follow up; BI-RADS-2 level is benign – follow up; BI-RADS-3 level is probably benign – ultrasound review within 3 months, mammography review within 6 months; BI-RADS-4 level is suspicious abnormality, requiring biopsy surgery, inside then three kinds: 4a low malignancy possibility, 4b malignancy may be moderate, 4c further suspicion of malignancy, but not up to level 5; BI-RADS-5 level is highly suggestive of malignancy – surgery. Foreign experience, mammography and ultrasound screening results: most should be BI-RADS. grade 1 and 2. The malignancy rate for surgical biopsy: BI-RADS.3 grade is less than 2%. BI-RADS.4 grade is between 23-30%. BI-RADS.5 grade is greater than 95%. Therefore, our experience is that patients with BI-RADS grade 3 should be closely followed up and treated with appropriate Chinese and Western medicine. With patients with BI-RADS grade 4, the surgeon’s motivation for biopsy should be increased. Especially for grade 4b,4c,.