A method for setting color temperatures of a plurality of displays included in a display system, the method comprising: by measuring light emitted from a display panel of a display using a built-in sensor, or by calculation using a controller of the display, acquiring outputable maximum luminances of each one of the displays at each of a plurality of color temperatures, the outputable maximum luminances being maximum luminances that the displays are able to output at each of the color temperatures, wherein the controller of the display acquires said outputable maximum luminances of the display by said measuring or alternatively acquires one maximum luminance of the display at a certain color temperature by said measuring and calculates the maximum luminances at the other color temperatures based on stored display characteristics data in the display; by the controller of the display, transmitting the acquired outputable maximum luminances to a controller of the display system; by the controller of the display system, comparing the outputable maximum luminances of the displays at an identical color temperature and determining the lowest maximum luminance value for each of the color temperatures, the lowest maximum luminance value being the lowest of the outputable maximum luminances; by the controller of the display system, setting, as a common set color temperature, a color temperature corresponding to the highest of the lowest maximum luminance values identified for each of the color temperatures; and by the controller of the display system, setting color temperatures of at least two of the displays to the common set color temperature. by measuring light emitted from a display panel of a display using a built-in sensor, or by calculation using a controller of the display, acquiring outputable maximum luminances of each one of the displays at each of a plurality of color temperatures, the outputable maximum luminances being maximum luminances that the displays are able to output at each of the color temperatures, wherein the controller of the display acquires said outputable maximum luminances of the display by said measuring or alternatively acquires one maximum luminance of the display at a certain color temperature by said measuring and calculates the maximum luminances at the other color temperatures based on stored display characteristics data in the display; by the controller of the display, transmitting the acquired outputable maximum luminances to a controller of the display system; by the controller of the display system, comparing the outputable maximum luminances of the displays at an identical color temperature and determining the lowest maximum luminance value for each of the color temperatures, the lowest maximum luminance value being the lowest of the outputable maximum luminances; by the controller of the display system, setting, as a common set color temperature, a color temperature corresponding to the highest of the lowest maximum luminance values identified for each of the color temperatures; and by the controller of the display system, setting color temperatures of at least two of the displays to the common set color temperature.