Fatty liver can be treated differently and the outcome can be completely different, so fatty liver cannot be generalized. For this reason, fatty liver is generally classified into simple fatty liver, steatohepatitis, steatohepatitis-related cirrhosis, and of course, it can also develop into liver cancer. The diagnosis is often made on the basis of ultrasound, which does not indicate obvious structural disorders in the liver, and basic normal liver function and fibrosis index. Steatohepatitis with liver fibrosis is a fatty liver with inflammation and fibrosis in addition to hepatocellular steatosis, which is often diagnosed on the basis of ultrasound indicating obvious disorder of intrahepatic structure, mild to moderate abnormal liver function or abnormal fibrosis indexes. Steatohepatitis-associated cirrhosis is a condition in which histopathological examination of the liver reveals complete destruction of hepatic lobular structures in addition to hepatocellular steatosis, replaced by pseudolobular formation and extensive fibrosis. The diagnosis is often made on the basis of ultrasound findings of small liver size, morphological derangement, disorganized intrahepatic structures, visible hypoechoic nodule formation, and reduced blood flow.