The present invention relates to a pharmaceutical composition for preventing or treating nervous system disorders, which contains sulfuretin or a pharmaceutically acceptable salt thereof, and a method of using the composition to prevent or treat nervous system disorders. Moreover, the present invention relates to a functional food composition for alleviating nervous system disorders, which contains sulfuretin or a pharmaceutically acceptable salt thereof. The pharmaceutical composition and the functional food composition can be effectively used to prevent or treat degenerative brain disorders caused by a variety of cerebral nervous system abnormalities in persons, as well as depressive disorder and anxiety.