1. A method of controlling a camera for color calibration of multi-displays, the method comprising: acquiring a plurality of images displayed on the multi-displays by photographing the multi-displays with the camera while adjusting a setting condition of the camera; analyzing the plurality of images of the multi-displays respectively, wherein the analyzing the plurality of images comprises: detecting a plurality of display regions from the acquired plurality of images, determining an effective data region in each display region, determining color data of each individual display from the effective data region, and determining color data of the multi-displays using the color data of each individual display; determining an optimum camera setting condition based on the color data of the multi-displays for every setting condition of the camera; and performing color calibration of the multi-displays based on the optimum camera setting condition.