A color correction detection device comprises an illumination information acquisition circuit, a first communication circuit, and a second communication circuit. The illumination information acquisition circuit is used for acquiring illumination information of an external flash; the first communication circuit communicates with a terminal device and is used for sending the illumination information to the terminal device and receiving color correction result information from the terminal device; the terminal device is used for performing color correction processing according to the illumination information, and generating the color correction result information; and the second communication circuit is used for communicating with the external flash, and transmitting the color correction result information to the external flash, so as to correct illumination of the external flash.