Transaminase 240 is generally referred to as transaminase 240 u/L. If it is caused by viral hepatitis, most patients are treated and their life expectancy is not affected. However, if it is caused by cirrhosis, liver cancer and other diseases, its survival life cannot be generalized. Transaminase is an important indicator of liver function, if the value of transaminase is abnormal, it may be caused by inflammation, toxicity, necrosis and other factors of the liver cells, if the patient’s transaminase 240u/L is mostly considered to be caused by viral hepatitis, cirrhosis, hepatocellular carcinoma, etc., and its life expectancy can’t be generalized due to the variability of individuals. If it is caused by viral hepatitis, most of the patients after standardized treatment, generally will not affect the life expectancy, and its survival time and normal people. However, if it is caused by cirrhosis, patients with good prognosis can survive for about 10 years or even longer. If it is caused by hepatocellular carcinoma, if the patient develops metastasis and his condition deteriorates, it may affect his survival time. If the patient has a transaminase of 240u/L, he/she should go to a regular hospital and undergo a relevant examination.