Cancer that metastasizes to the lungs may generally live 1-2 years or less than 1 year. The effectiveness of cancer treatment and whether it is accompanied by other complications have an impact on survival. In advanced cancer patients, cancer cells may metastasize to multiple organs. Metastasis to the lungs is also very harmful. The lung is a respiratory organ and if cancer cells metastasize to the lung, it will affect the lung function thus further affecting breathing. If the cancer is in advanced stage, the cancer cells will not only metastasize to the lung, but also to other important organs, such as the liver, etc. The survival rate is extremely low at this time, and the survival period may be less than one year, or even life-threatening at any time. If comprehensive treatment such as radiotherapy and chemotherapy is used to control the primary lesions and metastatic lesions, the survival time will be extended accordingly and may live 1-2 years. However, if the treatment effect of radiotherapy or chemotherapy is not satisfactory, the patient’s life will be in danger at any time. Therefore, when patients have symptoms of cancer metastasis to the lung, they need to actively cooperate with doctors, reduce panic and maintain an optimistic attitude to fight against the disease.