In the 1980s, China used more ultrasound machines, and after 2000, most of them have been upgraded to color ultrasound.The main diagnostic method of ultrasound is to adjust the brightness to display the tissue and organ sections that need to be scanned. Different tissues have different echo intensities, or different degrees of sound attenuation, which clinicians use to identify and analyze to make a diagnosis. Of course, if there are difficult cases or to identify benign and malignant tumors, ultrasound still has limitations. ultrasound is used to detect abnormalities, sometimes there is no way to further clarify the diagnosis, mainly in the clinical reference role, and in some cases need to be combined with CT and MRI to confirm the diagnosis. Ultrasound can show the shape, boundary, internal echo, and adjacency with surrounding organs, and it can also evaluate the shape, size, activity and hardness of the tumor. Therefore, it is also useful in identifying the benign and malignant nature of some abnormal localization. Ultrasound is a technology widely used and assisted by doctors in various clinical departments to make diagnosis of diseases.