The present invention relates to an antioxidant or skin whitening cosmetic composition containing, as an active ingredient, an extract prepared by a supercritical fluid extraction method, and in detail, the extract prepared by a continuous batch supercritical extraction method is generally Compared to the extract obtained by the conventional extraction method in which a solvent is applied, it has antioxidant, tyrosinase activity inhibition, and melanin production, thereby preventing skin aging and enhancing skin whitening. In addition, the continuous batch supercritical extraction method of the present invention is preferably carried out using carbon dioxide at 30 to 100° C. and 100 to 600 atm, and additionally, a co-solvent or a mixed fluid mixed with an auxiliary solvent is used. The co-solvent is preferably a mixture of one or two or more selected from ethanol, methanol, water, ethyl acetate, hexane and diethyl ether in addition to carbon dioxide by applying a supercritical fluid extraction method. . In addition, the extract of the present invention includes not only the extract by the above-described extraction method, but also an extract that has undergone a conventional purification process. For example, the active ingredient of the composition of the present invention is a solvent selected from the group consisting of water, anhydrous or aqueous lower alcohol having 1 to 4 carbon atoms, acetone, ethyl acetate, butyl acetate, and 1,3-butylene glycol. After extracting using or extracting using the above solvent, the mixed extract prepared by mixing it may also be included in the range of the extract of the present invention.본 발명은 초임계 유체 추출법에 의해 제조된 괭생이모자반 추출물을 유효성분으로 함유하는 항산화 또는 피부미백 화장료 조성물에 관한 것으로, 상세하게는 연속 회분식 초임계추출법에 의해 제조된 괭생이모자반 추출물이 일반적으로 용매를 적용하는 기존의 추출방식에 의해 수득한 괭생이모자반 추출물에 비해 항산화, Tyrosinase 활성 저해 및 Melanin 생성을 억제 하여 피부노화를 예방하고 피부미백 증진 효과를 가진다.또한, 본 발명의 연속 회분식 초임계추출법은 바람직하게는 30 내지 100℃ 및 100 내지 600 기압에서 이산화탄소를 이용하여 수행되며, 추가적으로 공용매 또는 보조용매를 혼합한 혼합
