Lung cancer has become an important killer of human health. The lung is also an important organ for other malignant tumors to metastasize. Currently, the preferred treatment for lung cancer is surgical resection, however, only 20% of diagnosed lung cancer patients are suitable for surgery, and most of them can only undergo chemotherapy or add radiotherapy. The introduction of radiofrequency ablation tumor treatment system brings a new option for lung cancer and lung metastatic tumor patients. Treatment Principle Radiofrequency ablation is a new technology of minimally invasive tumor treatment, in which electrode needles are inserted directly into the tumor and radiofrequency waves are emitted by multiple warhead electrodes, which can excite tissue cells to carry out plasma oscillation. It can effectively kill the local tumor cells, and at the same time, it can coagulate the tumor surrounding the effective tube tissue, block the tumor blood supply and help prevent the tumor from metastasis. Treatment method Under local anesthesia and CT positioning guidance (preferred method) or under general anesthesia and thoracoscopy, RF electrode needle is inserted into the tumor, and RF ablation is performed after opening the multi-shot electrode until the tumor is completely destroyed. This method has the advantages of minimally invasive, fast effect, short course and high safety, and can be well tolerated by patients with maximum age of 93 years. If combined with chemotherapy or radiotherapy, it can significantly improve the therapeutic effect. Indications 1.Lung cancer of advanced age, poor cardiopulmonary function, patient or family members unwilling to operate 2.Non-small cell lung cancer not suitable for surgical resection 3.Lung tumor with maximum diameter below 4.0cm, preferably peripheral type 4.Lung metastatic cancer caused by gastric cancer, colorectal cancer, breast cancer, kidney cancer, cervical cancer or ovarian cancer (the number of metastatic cancer should be within three).