Glutaminase is an indispensable enzyme in the human body, which exists in various cells in the human body, and is responsible for intervening in the human body between glutamate and pyruvate to transamination catalytic class of enzymes. Pyruvate is an important intermediate in the metabolism of sugar in all living cells and in the interconversion of substances in living organisms. Glutaminase is mainly found in the liver and the heart, especially in the liver, where it is one of the most sensitive indicators of whether the liver is functioning properly. When the liver is damaged glutamine aminotransferase will become very active, even if only one percent of the liver cells are damaged, the index of glutamine aminotransferase will rise, in the physical examination will be the fastest and most intuitive to determine whether the medical examiner is suffering from hepatitis and other liver diseases by observing the index of glutamine aminotransferase on the medical examination form.