A mixture of fermented artemisia with ginger is used for promoting the growth of animals or humans and promoting body weight gain in animals and humans to thereby increase livestock raising earnings and keep humans in good health. The mixture of fermented artemisia with ginger is prepared by fermenting artemisia with the use of one or more kinds of fermenting microorganisms selected from among a lactic acid bacterium, a yeast, a photosynthetic bacterium, an actinomycete, a thermophilic batch, koji mold and Bacillus natto and adding the fermented artemisia liquor thus obtained to ginger, The mixture of fermented artemisia withginger is added in an amount of 0.5 to 2.0% by weight to a feed or a food. Thus, it becomes possible to promote the growth of animals or humans and promote body weight gain in animals and humans to thereby increase livestock raising earnings and keep humans in good health,
