A light source apparatus including a light source is provided. The light source emits a light beam. The light beam illuminates a user so that at least one brain wave index of at least one region of frontal lobe regions of the user changes. A wearable apparatus is also provided.一種光源裝置,其包括光源。光源發出光束。光束照射使用者,以令使用者的額葉區中的至少一區的至少一腦波指標產生變化。另提供一種穿戴式裝置。