For those who are at high risk of liver cancer and those who are clinically suspected of liver cancer, doctors will selectively arrange the following tests to help diagnose: 1. Routine CT, MRI and other imaging tests can have a compliance rate of more than 90% for liver cancer. 2.Ultrasound examination is also important for the size, shape and location of tumor, which is often used as screening for liver cancer. 3.Serum alpha-fetoprotein (AFP) measurement, in China, more than 60% of liver cancer cases have serum AFP>400 μg/L; it has relative specificity for the diagnosis of liver cancer. 4.Selective hepatic arteriography, which is an invasive test, while chemotherapy and iodine oil embolization also have therapeutic effects, and is suitable for patients who cannot be diagnosed after other tests 5.Liver aspiration cytology by needle aspiration, which has a confirmatory value for the diagnosis of hepatocellular carcinoma and is the gold standard for the diagnosis of primary hepatocellular carcinoma, but still needs special attention combined with clinical.