The present invention relates to a skin-moisturizing or wrinkle-improving external composition or cosmetic composition which contains, as an active ingredient, a compound represented by Formula 1, which can be extracted from Anemarrhena asphodeloides Bunge, or a pharmaceutically acceptable salt thereof. The composition prevents skin moisture loss and thus suppresses skin tissue damage induced by UV rays and so has a skin-wrinkle preventing or alleviating effect.
