Cell engineering is a method to produce cosmetic raw materials by using cell and molecular biology technology. In this process, stem cell derivatives, cell growth factors and animal and plant extracts are widely used. Stem cell derivatives are active cytokines obtained by culturing stem cells in vitro. Among them, EGF (epidermal growth factor) is a common stem cell derivative, which can promote cell growth and repair. Cell growth factor is an efficient and specific bioactive polypeptide. They can stimulate cell proliferation, promote collagen synthesis and improve skin elasticity, thus playing a role in skin repair and anti-aging. Animal and plant extracts are anti-aging ingredients extracted from animals and plants. Such as ginseng, astragalus, sheep placenta and other animal and plant extracts are widely used in cosmetics, which have the functions of nourishing, antioxidation and promoting skin health.