Interstitial lung diseases(ILD), also known as diffuse parenchymal lung diseases, are a group of lung diseases with similar clinical, radiological and pathological manifestation. The causes include connective tissue disease-associated interstitial lung diseases, idiopathic interstitial pneumonias, granulomatous lung disorders etc. Most patients with ILD are recommended to take the glucocorticoid treatment. The adverse effects of glucocorticoids include the glucose metabolism disorder, weight gain, high blood pressure and osteoporosis.