How long a patient can live in the late stage of lung cancer depends on the actual situation of the patient and should be analyzed in a specific way, not to be generalized. The survival period of each patient with advanced lung cancer will be different due to individual differences, because of different pathological types, metastatic sites, treatment response and physical quality. If patients with advanced lung cancer do not undergo treatment but only daily care, the survival period is usually 3-6 months, and in case of elderly patients, the survival period will be shorter. At present, with the progress of modern medicine, after radiotherapy, chemotherapy and targeted therapy, the life expectancy of patients with advanced lung cancer will be extended accordingly, and the quality of life of patients can also be improved. Patients with advanced lung cancer need to undergo active treatment and also pay attention to psychological and physical care.