The present invention provides a method for extracting bio-water of a plant, which includes the steps of: generating steam by heating the plant in a heating and drying oven which is maintained at a first temperature range and obtaining condensed water by cooling the steam in a condensation tank which is maintained at a second temperature range which is lower than the first temperature range, the bio-water of the plant extracted thereby, and a cosmetic composition including the same. Accordingly, the present invention can obtain a skin soothing effect and a pore reducing effect.COPYRIGHT KIPO 2018본 발명은 식물을 제1온도범위로 유지되는 가열건조로에서 가열하여 수증기를 발생하는 단계 및 상기 제1온도범위보다 낮은 제2온도범위로 유지되는 응축조에서 상기 수증기를 냉각하여 응축수를 얻는 단계를 포함하는 식물 생체수의 추출방법, 동 방법에 의해 추출된 식물 생체수 및 이를 포함하는 화장품 조성물을 제공한다.