In recent years, the incidence of breast cancer has been increasing year by year, ranking first among women with malignant tumors. Mammography, mammogram and breast ultrasound are becoming more and more popular, so it is necessary to standardize the diagnostic report. In the past two years, large hospitals and specialized hospitals in China have started to align with international standards and applied 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 together with the American Cancer Center, the American Surgical Association, the American Pathological Association, and the FDA. It is widely recognized by the international medical community. BI-RADS. Diagnostic criteria evaluation classification: BI-RADS-1 level is no abnormality seen – follow up. BI-RADS-2 grade is benign – follow up. BI-RADS-3 grade is probably benign – ultrasound review in 3 months and mammography review in 6 months. BI-RADS-4 grade is suspicious for abnormality and requires biopsy surgery, inside then three types: 4a low malignancy possible, 4b moderate malignancy possible, 4c further suspicion of malignancy but not up to grade 5. BI-RADS-5 grade 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, . The purpose of this paper, so that the majority of women, patients and family members of mammography and high-frequency ultrasound breast imaging reports and data systems, BI-RADS, to understand and informed, to facilitate communication with medical personnel. To actively cooperate with follow-up, review, treatment, biopsy and surgery.