Breast ultrasound diagnosis is one of the important references for our breast surgeons to develop the next treatment plan. 1, BI-RADS 0: need to rely on other imaging examinations (such as mammography, infrared examination or MRI) to further determine the condition. 2, BI-RADS 1: Negative. No positive clinical signs and no abnormalities in ultrasound images, such as: no masses, no structural distortion, no skin thickening and no microcalcifications, etc. 3. BI-RADS 2: benign lesions. Basically, malignant lesions can be excluded. Follow-up for 3-6 months is feasible according to age and clinical manifestations. Such as cysts, breast prosthesis, lipomas, intramammary lymph nodes (which can also be classified as category 1), postoperative changes in benign lesions with no change in images on multiple reviews, and nodules with documented little change in images after multiple examinations may be fibroadenomas, etc. 4. BI-RADS 3: Possible benign lesions. Short-term (3~6 months) review and other further examinations are recommended. 5.BI-RADS 4: suspicious malignant lesions. The possibility of malignancy of this grade of lesion is 2% to 95%. Assessment of category 4 means that histopathological examination is recommended: fine needle aspiration cytology, hollow core needle aspiration biopsy, surgical biopsy to provide cytological or histopathological diagnosis. Currently, they can be classified as 4A, 4B, and 4C. category 4A is more likely to be benign, and fibroadenomas that are not certain, intraductal lesions with nipple overflow or blood spillage, and inflammatory mammary glands that are not clear can be classified in this category, with a malignancy compliance rate of 2% to 10% for this category; category 4B is difficult to clarify based on sonograms, with a malignancy compliance rate of 10% to 50% for this category; category 4C suggests a higher likelihood of malignancy The rate of such malignancy is 50%~95%. 6, BI-RADS 5: highly likely malignant, should actively take appropriate diagnostic and treatment measures. Lesions with obvious malignant features on ultrasound sonogram are classified in this category, and the likelihood of malignancy is greater than or equal to 95%, and active treatment should be initiated, such as mammaplasty biopsy or surgery. 7. BI-RADS 6: This category requires mammaplasty biopsy to confirm that the result is often malignant, but imaging evaluation for treatment has not yet been performed. The main purpose is to evaluate imaging changes after prior biopsy or to monitor imaging changes from neoadjuvant chemotherapy prior to surgery.