Liver function test is to monitor various indicators related to liver function and metabolism by various biochemical experimental methods to reflect the basic status of liver function, and the results are usually available in about 4 hours. There are many liver function tests, usually including protein metabolism, enzymatic indexes, bilirubin and bile acid metabolism, lipid metabolism, liver excretion and detoxification, etc. Usually, it is not necessary to check every item, but a group or several tests can be selected according to the patient’s medical history and symptoms, which can help patients to detect and diagnose certain diseases early, such as acute and chronic hepatitis, alcoholic liver, drug-related hepatitis, Fatty liver, liver cirrhosis, and hepatobiliary system diseases. It is important to note that the liver function test must be performed on an empty stomach for 8-12 hours, and that no alcohol should be consumed the night before the test, and no spicy or greasy food should be eaten to avoid affecting the test results.