Pneumonia, a commonly-encountered disorder of pulmonary system during infancy, is mainly caused by exogenous pathogenic factors and clinically marked by fever, cough, rale and asthma. In severe cases, pale complexion, cyanotic lips and dyspnea can be seen. The disease is identical with the conception of pneumonia in modem medicine which includes bronchial pneumonia, lobar pneumonia, interstitial pneumonia, etc.. The main pathogenic factors are viruses and bacteria. The disease may occur during the whole year, but prevail in spring. Infants are susceptible to the disease. The younger the infants are, the more they are susceptible to the disease. Pneumonia, liable to deteriorate, occurs suddenly and severely. For the patients of young age and weak physique, the disease is subject to repeated attack and is lingering and intractable. If timely treatment is planned at the early stage, the prognosis is favourable.