PURPOSE: An external use skin composition containing mate extract-filtered liquid is provided to ensure anti-oxidation, collagen synthesis, anti-wrinkling, whitening, moisturizing, and skin irritation relieving. CONSTITUTION: An external use skin composition contains 0.001-30.0 wt% of mate extract-filtered liquid as an active ingredient. A method for preparing the liquid comprises: a step of preparing mate extract; a step of mixing the mate extract with Grifola frondosa(KCTC 10337BP) mycelium and culture liquid thereof and culturing at pH 5.0-6.0; and a step of removing the mycelium from the culture liquid. The external use skin composition is used for skin whitening, anti-aging, skin irritation relieving, atopic dermatitis treatment, and acne prevention. An external use skin composition is manufactured in the form of lotions, gels, water soluble liquids, creams, essences, basic cosmetic formulations of oil-in-water type or water-in-oil type, makeup bases of oil-in-water type or water-in-oil type, foundation, skin cover, lip stick, lip gross, face powder, two way cake, eye shadow, cheek color, or eyebrow pencils.본 발명은 무환자나무목 감탕나무과 마테(Mate) 전초(全草)로부터 추출물을 추출하는 단계; 상기 추출물에 잎새버섯(KCTC 10337BP) 균사체 또는 잎새버섯(KCTC 10337BP) 균사체의 전 배양액을 혼합한 후, 본 배양하는 단계; 상기 본 배양 후, 본 배양액으로부터 잎새버섯(KCTC 10337BP) 균사체를 제거하는 단계;로부터 수득된 여과액을 유효성분으로 함유하는 것을 특징으로 하는 피부 외용제 조성물에 관한 것으로, 항산화 효과, 콜라겐 합성 촉진효과, 피부 잔주름 개선효과, 미백효과, 보습효과, 피부자극 완화효과, 여드름 방지효과, 아토피 개선효과 및 항염 효과 등 피부개선에 우수한 효과를 나타낸다.