Liver reserve function is usually evaluated by a comprehensive examination, which mainly includes laboratory tests and imaging tests. Laboratory tests need to check liver function, in which the level of bilirubin index needs to be looked at, and if it is too high, it is not suitable for any type of hepatectomy. Also, the protein level needs to be observed, and the four coagulation tests need to be checked to assess whether there is a possibility of hemorrhage after surgery, and serum protein electrophoresis needs to be checked to assess the degree of cirrhosis. Some patients need to check indocyanine green excretion test, which is currently one of the most valuable methods to assess liver reserve function before hepatectomy, and some patients need to check ICG blood clearance and maximum clearance. Imaging tests, including ultrasound, CT and MRI, are used to determine the presence and severity of cirrhosis from the morphology of the liver and accompanying signs, and thus help assess liver reserve function.