Normal liver function test could not reveal that there is no further problem in liver. We have to interpret the abnormal data by the half-life of synthesis and reduction of AST and ALT to determine liver disease. We also determine the cause of jaundice via the lab data of total bilirubin, formatted and secreted from gallbladder. We could differentiate the status of Hepatitis B by the lab data, no matter in acute, chronic or progressing stage. We could determine liver cirrhosis or liver tumor through lab data before the treatment based on pattern identification in Traditional Chinese Medicine.