With the increasing social pressure and pace of life, breast disease has gradually become a common disease among women in China, and its incidence has been rapidly increasing in recent years, ranking first in the incidence of female tumors. With the extensive development of breast screening and the continuous updating of diagnostic imaging technology, the detection rate and accuracy of breast disease diagnosis have been continuously improved. According to the 2006 malignancy report of Shanghai Center for Disease Control and Prevention, the incidence of breast cancer among women in Shanghai has increased by 138% in the past 30 years. The Cancer Hospital of Fudan University counted 6,167 breast cancer cases from 1990 to 2005, showing that 56% were premenopausal women. Thus early onset and high incidence have become the characteristics of breast cancer incidence in Shanghai. As a result of the increased incidence of breast cancer, the death rate of breast cancer will increase simultaneously and the medical burden will increase. According to the data of breast cancer screening in the United States, the death rate of breast cancer in the United States increased at a rate of 0.4% per year from 1975 to 1990. However, due to widespread screening, the breast cancer death rate decreased at an annual rate of 2.3% from 1990 to 2000. Ultrasound examination of breast diseases began in the 1950s when foreign scholars such as Wild (1951) used pulsed A-type ultrasound to detect breast tissues and breast masses and obtained the sonogram of each B-type. Kossoff G (1972) reported that gray-scale ultrasound could clearly show the breast and its pathological features. In the mid and late 80s, high-frequency probes were used to diagnose breast diseases, and good results were achieved. After the 1990s, the ultrasound industry at home and abroad reported a large number of applications of color flow imaging in the diagnosis of breast diseases (especially breast tumors), so that the ultrasound examination of breast diseases has developed significantly in terms of depth and breadth of research. Because of the superficial location of breast tissue, it is suitable for scanning with high-frequency probe, which is safe, easy to perform and can be scanned several times compared with other auxiliary examination methods. For some diseases, dynamic observation can be performed, and the clinical diagnosis rate is also high, so it has been used as one of the important routine auxiliary examination methods in clinical practice.