1.Ultrasound examination: It is a means to diagnose liver cancer. Ultrasound is characterized by relatively easy operation, low cost and high detection rate of liver lesions. Generally, ultrasonography is often used for post-treatment follow-up and census of this disease, which can show the shape and size of patients’ tumors and is valuable for the diagnosis of liver tumor diseases. 2.CT: Examining liver cancer is a very important means. CT examination is a common diagnostic method for liver cancer, which can clearly show the size and shape, number and boundary of the patient. In addition, according to the image analysis, it can reconstruct each pipeline in the liver, which can precisely show the relationship between the blood vessels of each liver segment and the tumor. Magnetic resonance imaging is very helpful for benign lesions of hepatocellular carcinoma tumors, and this diagnostic method often complements CT diagnosis 3. alpha-fetoprotein (AFP): It has good sensitivity for examination, and should be taken seriously when it is elevated, but not all patients with hepatocellular carcinoma have elevated AFP in clinical practice; therefore, elevated AFP cannot be used as a basis for confirmation of diagnosis, but can be used as a hint and should be further examined. For postoperative patients, they can be monitored for tumor recurrence. 4. Possible symptoms: Early liver cancer patients may show symptoms similar to common liver diseases such as decreased appetite, weakness, easy fatigue, diarrhea, etc. When liver cancer lesions are closer to liver envelope, early symptoms of liver cancer can also be manifested with pain in liver area. When patients who have been suffering from chronic hepatitis B, chronic hepatitis C or cirrhosis for many years, suddenly reappear with liver disease symptoms or sudden aggravation of existing symptoms after their condition has been stable, they should be alerted. In fact, most of the liver cancers in China are developed from hepatitis B cirrhosis. If standardized treatment and regular review can be done in the early stage of hepatitis, the development of hepatitis into cirrhosis or liver cancer will be limited to the greatest extent.