PURPOSE: Functional sauce containing a fermented Cudrania tricuspidata product, and a producing method thereof are provided to use Cudrania tricuspidata fruit for offering excellent anti-oxidation ability and blood cholesterol decreasing function.CONSTITUTION: A producing method of functional sauce containing a fermented Cudrania tricuspidata product comprises the following steps: injecting 0.1-1%(v/w) of Bacillus subtilis or Bacillus licheniformis to Cudrania tricuspidata fruit powder inserting 5wt% of distilled water into the Cudrania tricuspidata fruit powder, and fermenting the mixture at 40 deg. C for 48-72 hours in 70-90% relative humidity drying the fermented Cudrania tricuspidata product before firstly and secondly extracting at 60 deg. C for 3 hours each, and thirdly extracting the product at 90 deg. C for 2 hours and concentrating the pulverizing the obtained extract, and mixing water with the obtained powder.COPYRIGHT KIPO 2013본 발명은 구지뽕 발효산물을 이용하여 제조된 기능성 소스 및 이들의 제조방법에 관한 것으로, 보다 상세하게는 항균 및 항산화 작용, 항당뇨, 항고지혈증, 항고혈압, 항세포독성 등의 다양한 효능을 가지는 구지뽕 열매의 발효산물을 포함하는 기능성 소스 및 이들의 제조방법에 관한 것이다.