The survival time of patients with interstitial pneumonia is related to their specific condition and cannot be generalized. Interstitial pneumonia is a more serious disease that includes both acute and chronic interstitial pneumonia. If the disease is caused by a viral infection, acute infectious interstitial pneumonia is usually treated aggressively to remove the triggering factors and usually results in a complete recovery without affecting life expectancy. In the case of idiopathic acute interstitial pneumonia, hormone therapy is generally ineffective, and patients may develop cough and dyspnea within a short period of time, and the disease progresses more rapidly. In severe cases, respiratory failure and finally death can occur within days, weeks or a month. In case of idiopathic interstitial pulmonary fibrosis, which is a chronic progressive disease, the general survival period is 2-4 years without regular and active treatment, and with treatment with adrenocorticotropic hormones or other drugs, the life expectancy can be extended to more than 6 years. In addition, it is recommended that patients actively quit smoking during the disease, avoid exposure to radiation and get out of the dusty environment.