Mammography is a reliable non-invasive test for breast disease, usually followed by a surgical biopsy. Mammography is the first choice and the easiest and most reliable non-invasive test for diagnosing breast diseases. It is relatively painless, simple and easy to perform, with high resolution, good reproducibility, and is not limited by age or body shape. It can detect breast lumps that cannot be touched by a doctor, and its diagnostic validity can be as high as 95%, especially for large breasts and fatty breasts. Therefore, it is not recommended to perform a surgical incision before the initial mammogram because it will destroy the original structure of the breast and the initial mammogram after the surgery has lost its significance. At the same time, the initial mammogram can provide a reference for the scope of surgical excision and a baseline level for the evaluation of the effectiveness of subsequent treatment. If the mammogram is performed in the course of treatment, it can be performed after the surgical excision, and can be compared with the results of the initial mammogram to evaluate the treatment effect. It is recommended that the relevant examination should be performed in a regular hospital under the guidance of a doctor.