The results showed that the proportion of patients with at least one error in the technique using the metereddose inhaler (MDI) and dry-powder inhaler (DPI) was 85.83% and 78.13%, respectively; The most common mistake for using MDI of patients were shaking the medicine, exhale with all might, coordinate hand pressuare and mouth inhalation, and holding the breath; for DPI included exhale with all might, inhaling medicine, and holding the breath.