The preparation of cosmetic active ingredients as nanocarrier could effectively promote the transdermal absorption of active ingredients in cosmetics and significantly increase the retention of cosmetic active ingredients in the skin care targeted area. Besides, nanocarriers have following advantages. Firstly, nanocarriers have good sustained release and controlled release properties. They can play the role of storage in the skin tissue, and continuously release the active ingredients, so as to give full play to their skin care effect. Secondly, nanocarriers can effectively improve the solubility and water dispersion of insoluble active ingredients, avoid crystallization during the placement process, and improve the content of active ingredients in cosmetics. Thirdly, nanocarriers can also effectively improve the stability of light sensitive and heat sensitive active ingredients, reduce or eliminate the side effects of irritating active ingredients on the skin. Finally, nanocarriers can simultaneously load and transport various active ingredients of cosmetics, achieve synergistic effect of different active ingredients, and significantly improve the effect of functional cosmetics skin care.