1. Proficiency in various operational skills. Operating skills are the basic condition of ultrasound diagnosis. Good operating techniques, clear image display, diagnosis becomes relatively easy. Just like “see good, not strong fight good”. I often take the patient when the patient is less manipulation calcination, over time, will invariably improve their own manipulation. 2, solid and extensive clinical knowledge is the premise of improving the diagnosis. The diagnosis of ultrasound is clinically oriented, and an ultrasound picture can be the ultrasound performance of a variety of diseases. Therefore, ultrasound cannot look at the picture and must be combined with clinical. 3, strengthen the learning of ultrasound expertise is a necessary condition to improve the level of diagnosis. As an ultrasound worker should have strong basic knowledge of the specialty. 4, pay attention to the training of the way of thinking from positioning – qualitative – differential diagnosis. Positioning is the key and is the guide for diagnosis. The localization of some lesions is easy and simple, but sometimes it is difficult, such as lesions located in the liver, right kidney and right adrenal junction, the localization is quite difficult. Qualitative is the perfection, the key part of the diagnosis. The differential diagnosis is the supporting evidence. Differential diagnosis is inseparable from the establishment of the diagnosis. The differential diagnosis gives us a reliable basis for the diagnosis, and it is close to or even coincides with the real result. 5.Follow up diagnosis. Follow-up diagnosis plays a very important role in improving the level of ultrasound diagnosis. Whenever we do a more complex disease from a person, often made a diagnosis, but the heart still want to know the final surgery and pathology results. Follow-up is the only way to further deepen our understanding of the correct diagnosis of the disease sonogram, and to find the reasons for the errors in cases of missed diagnosis and misdiagnosis, so that we can avoid the corresponding errors in the future, thus achieving the purpose of improving the diagnosis.