In general, during liver function test, indicators reflecting hepatocellular injury such as alanine aminotransferase, indicators reflecting hepatic metabolic function such as glutaminyltransferase, and indicators reflecting hepatic synthetic function such as albumin are more important. 1. Indicators reflecting hepatocyte injury: glutamine aminotransferase has the highest content in hepatocytes, and can be released into the blood in large quantities when hepatocyte injury occurs, causing elevation of serum glutamine aminotransferase, which is a sensitive indicator reflecting hepatocyte injury; glutamine aminotransferase mainly exists in the mitochondria of hepatocytes, and can be caused to elevate by glutamine aminotransferase when the mitochondria of hepatocytes are damaged. 2. Indicators reflecting the metabolic function of the liver: total bilirubin, direct bilirubin, indirect bilirubin, when the metabolic ability of the liver decreases, bilirubin can be caused to rise; when the intrahepatic bile ducts are blocked, it can be caused by the obstruction of the excretion of glutamyltransferase, which can lead to its elevation. 3. Indicators reflecting the synthesis function of liver: liver cells can synthesize many kinds of proteins, such as albumin, cholinesterase, etc. When the value of albumin decreases, it suggests that the synthesis ability of liver is impaired. If the liver function test is abnormal, it should be treated in the hospital in time.