PROBLEM TO BE SOLVED: To provide a simple method for measuring skin beauty and a method for screening a component effective for an improvement in skin condition.SOLUTION: The skin is irradiated with light having a color temperature of 4,500-5,500 K intensity of light in a wavelength region of 460-500 nm, which is generated from the skin, is measured and skin beauty is measured by using the intensity of the light as an index. In the case of the higher intensity of the light, it is determined that the skin is more beautiful, and a skin color improvement factor amount including NADH existing in the skin is estimated.
