Salidroside is a compound that extracted from dry roots, rhizomes or the whole dry body of Rhodiola wallichiana (Crassulaceae),with the function of preventing cancer, enhancing immunologic function, anti-aging, anti-fatigue, anti-anoxia, anti-radiation, dual-direction regulation of central nervous system, and repairing and protecting the body and so on. It is commonly used as a treatment for chronic diseases and frail susceptible patients. Nowadays, rhodiola rosea extract is used as cosmetic ingredient for skin care. It has anti-oxidation, whitening and anti-radiation effects.