The invention relates to a method for measuring and calculating visual effects of a target in different light environments, comprising: a), setting a light environment; b), measuring a color temperature and time relation; c), visually recognizing a driver target; d), resetting the light environment, and repeating step c); e), processing visual recognition information data acquired by testing to establish relations of visual recognition time to light environment parameters, namely, color temperature, rendering index and brightness parameter; f), carrying out visual efficacy analysis according to processing results of the visual recognition information data. The invention also provides a measuring and calculating method for color temperature standard of an intermediate segment of a daytime tunnel, comprising: a), setting a light environment; b), measuring a color temperature and time relation; c), acquiring a stable color temperature segment; d), determining color temperature standard. The method of the invention carries out visual efficacy analysis on the visual impact of light environment settings of nighttime road and tunnel intermediate segment lighting upon a driver, and good guidance standards are provided for reasonable and efficient setting for color temperature, rendering index and average brightness of lighting devices.