Ultrasound technology has an important role in the diagnosis and treatment process. Currently, in cooperation with the clinical team, the following tasks can be performed through ultrasound guidance: 1. drainage: puncture and placement of a small amount of plasma cavity fluid (pericardial, thoracic, abdominal), bile drainage, abscess puncture and drainage, drainage treatment of liver and kidney cysts. 2.Puncture biopsy: superficial lymph nodes, liver occupancy, kidney biopsy, breast mass biopsy, abdominopelvic mass, etc. 3.Ablation therapy: ablation therapy for tumors in the liver and other parts (radiofrequency ablation and chemical ablation).