The present invention relates to a fermented earthworm extract which is prepared by mixing a mixture formed from immersing sugared and aged earthworms in water and heating the same, with a medicinal extract extracted from medicinal materials containing Salvia plebeia, and distilling the same； and to a natural cosmetic product or a functional health food which comprises the fermented earthworm extract as an effective component. More specifically, the present invention relates to a fermented earthworm extract which has excellent skin compatibility, has excellent absorption ability allowing effective components to be absorbed into the skin, thus exhibiting excellent skin regeneration effects on burns, scars, and the like, and has improved skin moisturization ability, thus exhibiting excellent alleviating effects on allergic and atopic dermatitis； a preparation method of the same； a natural cosmetic product using the same, which contains a fermented earthworm extract, has excellent moisturization ability and absorption ability, and promotes skin regeneration； and a functional health food effective for preventing blood-related adult diseases containing a fermented earthworm extract. In particular, the present invention prepares the fermented earthworm extract by mixing the mixture formed form heating sugared and aged earthworms, with the medicinal extract extracted from medicinal materials containing Salvia plebeia, and distilling the same； and eliminates undesirable smells characteristic to earthworms, thereby appealing to consumers. In particular, the natural cosmetic product containing the earthworm extract prepared according to the present invention has excellent skin compatibility, has excellent absorption ability allowing effective components to be absorbed into the skin, thus exhibiting excellent skin regeneration effects on burns, scars, and the like, and has improved skin moisturization ability, and thus can alleviate allergic and atopic dermatitis. In addition,
