The basic principle of RF tumor treatment system is to generate heat energy through the vibration and friction of polar molecules in tissues by RF wave/ alternating current wave. When the temperature exceeds 60℃, the tumor cells will rapidly undergo protein denaturation and coagulation necrosis to achieve the purpose of tumor treatment. Radiofrequency tumor treatment system is a new technology of modern high technology penetrating into medical field. This treatment technology has the advantages of small trauma, exact efficacy, fast recovery, short hospitalization time, and can precisely observe the treatment effect with the help of imaging technology. Compared with surgery, radiofrequency ablation treatment has no significant difference in 1, 2 and 3 years survival rate and recurrence rate in the treatment of small hepatocellular carcinoma, while it has better efficacy in terms of safety, complications and survival quality. For those patients who cannot be surgically resected or are unwilling to operate due to various reasons such as old age and weakness, patients who are unwilling to bear the side effects of radiotherapy and chemotherapy or patients who are not well treated by radiotherapy and interventional therapy, and patients with recurrence and metastasis of middle and late stage tumors, radiofrequency ablation is also the preferred treatment. The routes of radiofrequency treatment include percutaneous, intraoperative and laparoscopic. The intraoperative radiofrequency ablation treatment program for liver cancer has the following features: intraoperative radiofrequency treatment selects small incision into the abdomen for exploration and operates under direct vision with intraoperative ultrasound guidance and monitoring, which not only broadens the scope of radiofrequency treatment for liver tumors, but more importantly makes the treatment more accurate and avoids serious complications such as misablation of surrounding tissues and organs, bleeding and needle tract metastasis brought by radiofrequency treatment. Radiofrequency ablation therapy adapts to the trend of minimally invasive treatment of diseases in the new century and widens the scope of treatment methods for liver cancer, which can benefit about 15-20% of patients with liver cancer and liver metastases in our hospital. It has brought new hope to the treatment and recovery of liver cancer patients, and also filled a gap in liver cancer treatment.