Patients were surveyed fully evaluate the characteristics of epidemiology, basic disease features, features of the exacerbations of asthma, time of stable disease and hospitalization time. Results: Patients with acute asthma have mean age of 39.46 ± 14.53 (year-olds), mean duration of asthma 16.02 ± 14.86 (years), intermittent asthma (8.4%), mild persistent asthma (25.2%), moderate persistent asthma (40.5%) and severe persistent asthma (26.9%).