The present invention relates to a novel use of sesquiterpenoid compounds, the pharmaceutically acceptable salts thereof, or the extracts of Cyperus rotundus comprising same or the fractions thereof in the prevention or treatment of menopausal diseases.The sesquiterpenoid compound according to the present invention, the extracts of Cyperus rotundus comprising the same or fractions thereof exhibit excellent estrogenic activity or anti-allergic activity, and therefore they can be used for the prevention or treatment of menopausal diseases caused by a decline in estrogen level or by allergic diseases.
