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. Breast cancer screening data in the United States show that the death rate from breast cancer in the United States increased at an annual rate of 0.4% from 1975 to 1990. However, due to widespread screening, the death rate from breast cancer declined at a rate of 2.3% per year from 1990 to 2000. The outcome of breast cancer treatment is closely related to early diagnosis and timely treatment. Early breast cancer screening has been internationally ranked as an effective prevention and control measure to improve patient survival and reduce mortality. Ultrasound has been used in the examination of breast diseases for more than 50 years, and foreign scholars such as Wild (1951) used pulsed A-mode ultrasound to detect breast tissue and breast masses and obtained individual B-mode sonograms. In China, the clinical application of real-time ultrasound for ultrasound examination of breast diseases began in the late 1970s, with the earliest report by Xu Guangbo (1979). high-frequency probes were applied to diagnose breast diseases in the mid-late 1980s, and better results were achieved. After the 1990s, the domestic and foreign ultrasound community reported a large number of color flow imaging applied to the diagnosis of breast diseases (especially breast tumors), so that the ultrasound examination of breast diseases has made great development in terms of depth and breadth of research. Initially, breast ultrasound was generally used to grossly visualize the breast structure and to help identify cystic and solid masses to some extent. However, with the continuous development of image resolution and computer processing technology, and the continuous application of new ultrasound technologies such as ultrasonography, elasticity, and three-dimensional ultrasound, ultrasound examination can increasingly reflect the fine structure and microscopic lesions in the breast, and ultrasound diagnosis of breast disorders has become a routine examination tool with high sensitivity and specificity. Ultrasound is painless to the patient, non-radioactive, and can be repeated for short periods of time. No special preparation is required before the examination, and the procedure is simple and has no blind spots. Moreover, due to the superficial location of the breast, ultrasound has good resolution of soft tissues and can clearly display the layers of the breast and chest wall, allowing the anatomical site and level of the lesion to be determined, identifying breast masses and chest wall masses, and finding small masses of several millimeters in the breast. Ultrasound can measure the size of breast masses, show the internal structure of the masses, determine the physical nature of the masses (cystic, solid or mixed cystic-solid), and understand the infiltration of breast tumors into surrounding tissues. According to the sonographic performance, combined with the blood flow signal characteristics, it helps to further identify the benign and malignant breast tumors. Ultrasound-guided cytological examination or coarse needle aspiration biopsy as well as treatment are selectively performed for breast tumors that cannot be identified. In summary, compared with some other auxiliary examination methods, ultrasound examination has the advantages of non-invasive, simple and easy to perform, and it can also perform dynamic observation and has a high clinical diagnosis rate, therefore, breast ultrasound has been used as one of the important routine imaging examination methods in clinical practice. However, breast ultrasonography has limitations such as operator dependence, subjective factors, and occult lesions.