Only with the information of 7 times of chemotherapy for lung cancer, the severity of lung cancer disease cannot be judged. Whether lung cancer disease is serious or not generally needs to be based on several aspects, such as the patient’s clinical stage, pathology type and sensitivity to treatment. Generally speaking, the later the clinical stage of lung cancer, the higher the malignancy of the pathological type, and the worse the sensitivity of the patient to chemotherapy, the more serious the condition of lung cancer is. If the lung cancer disease of a lung cancer patient is effectively controlled after 7 times of chemotherapy and the efficacy of chemotherapy is evaluated as complete remission, it means that the lung cancer is not serious. If lung cancer is not sensitive to chemotherapy, and the condition is not effectively controlled after 7 times of chemotherapy, and the lung cancer continues to progress, it means that the condition of lung cancer is more serious. Patients are advised to actively cooperate with doctors for treatment so as to avoid delaying the condition.