Abstract: The present disclosure relates to a method for skin improvement using low-dose radiation, and the low-dose radiation can exhibit excellent effects of improving skin wrinkles, improving skin barriers, improving skin thickness, improving skin elasticity, and improving skin moisture through the mechanisms of promoting the growth of normal human dermal fibroblasts, increasing the collagen synthesis within the normal human dermal fibroblast, or reducing the metalloproteinase synthesis within the normal human dermal fibroblasts, thus being effectively used for skin improvement. Additionally, the low-dose radiation of the present disclosure can exhibit excellent hair growth-promoting effect through the mechanisms of promoting the growth of human dermal papilla cells or activating hair follicle cells, thus being useful for the improvement of promoting hair growth.