If the tumor is detected early and can be completely removed, it is likely to be cured. However, if the tumor is detected in the middle or late stage, the chance of surgical resection has been lost, so we can only try to control the tumor and prolong life. Small cell lung cancer is the most malignant of all lung cancers, and the median survival time is about 0.5 years. Even if surgery is not possible, the patient’s life can be prolonged through chemotherapy and radiotherapy, especially for lung adenocarcinoma, if there is a genetic mutation in the genetic test, it is suitable for oral targeted drug therapy, and even long-term survival can be achieved if the effect is good.