The severity of fatty liver disease is usually distinguished by imaging tests, and most patients can distinguish between mild, moderate or severe fatty liver by examining CT or liver ultrasound. Therefore, patients with fatty liver must have regular checkups of liver function, blood lipids and liver imaging, especially liver imaging is very important and can be used as a criterion for diagnosing fatty liver. Fatty liver is a metabolic disease of the liver, mainly due to excessive fat deposition in the liver. If abnormal liver function occurs it requires prompt anti-inflammatory and liver-protective treatment, and a relevant plan is formulated according to liver imaging. Most patients can be improved by giving liver-protective and anti-inflammatory treatment at an early stage, as well as a low-salt and low-fat diet and appropriate physical exercise.