Generally, small cysts in the liver do not become malignant, but the first prerequisite is that the patient is diagnosed with liver cysts after detailed examination, and generally their differential diseases are mainly metastases of the liver, as well as primary tumors of the liver, hepatic hemangiomas, liver abscesses, and liver encrustation disease. If the patient is diagnosed with liver cyst after upper abdominal ultrasound or upper abdominal CT, it is recommended that the patient can dynamically observe the change of liver cyst diameter and review the upper abdominal ultrasound once every six months or once a year. If the diameter of liver cyst is less than 5cm as indicated by ultrasound, patients can observe further and do not need to take drugs, which are mostly ineffective for liver cysts. If the diameter of liver cyst exceeds 5cm, it is suggested that the patient should consider active treatment, and ultrasound-guided percutaneous transhepatic liver cyst puncture and drainage is the first treatment method, and after the cyst fluid is drained after 3 days, anhydrous alcohol can be injected through the catheter to further destroy the cyst wall, and the liver cyst can be cured. Another method, mainly for liver cysts located on the surface of the liver with multiple compartments, is to consider laparoscopic decortication and drainage of liver cysts, in which a portion of the cyst wall is removed from the lowest position of the cyst wall under direct laparoscopic view and an abdominal drainage tube is placed, and the patient can also be cured after about 3-6 days of drainage.