An environmental control method, including: receiving settings of a favorite emission color of light that the subject likes and an unfavorite emission color of light that the subject does not like; and switching between first control and second control at a predetermined timing, the first control making a function of a sympathetic nervous system of the subject dominant over a function of a parasympathetic nervous system of the subject by causing an indirect lighting apparatus disposed in a space in which a subject is located and capable of changing an emission color of light to emit light having the unfavorite emission color of the subject received, the second control making the function of the sympathetic nervous system of the subject dominant over the function of the parasympathetic nervous system of the subject by casing the indirect lighting apparatus to emit light having the favorite emission color of the subject received.