Lung cancer clinically mainly includes non-small cell lung cancer and small cell lung cancer, among which non-small cell lung cancer mainly adopts TNM staging and is clinically divided into four stages. For stage I non-small cell lung cancer, the treatment principle is based on radical surgery, and patients with high risk of recurrence after surgery can consider postoperative adjuvant chemotherapy, while for stage II and III, also radical surgery is the mainstay, and postoperative adjuvant chemotherapy is required, and some of patients also need to do postoperative adjuvant radiotherapy. For stage IV non-small cell lung cancer, the treatment is a combination of chemotherapy and targeted therapy. Small cell lung cancer is mainly divided into extensive stage and limited stage. For limited stage small cell lung cancer, only very few patients can receive surgery, while most patients, if their physical condition allows, use synchronous radiotherapy and most use sequential radiotherapy, while for extensive stage small cell lung cancer, the integrated treatment is mainly chemotherapy.