If lung cancer has metastasized, in most cases, the patient can survive for about a year. However, this time often depends on the patient’s physical condition and the sensitivity of the treatment. Depending on the severity of metastasis and the treatment after metastasis, the survival time of lung cancer patients may be different. For some patients who are more sensitive to chemotherapy, immunotherapy or molecular targeted drugs, the treatment effect is often more satisfactory and the survival time is much longer. If the patient is in poor health and has lung cancer metastasis, the survival time may be only a few months.