A photographing device may reduce additional consumption of memory capacity and power and capture high resolution images. A method of controlling the photographing device includes storing first resolution input images acquired from live view images in a buffer; storing, according to an input of a time point, a second resolution input image acquired at the time point from the live view images in the buffer; and generating a result image based on the second resolution input image when the second resolution input image, which is stored within a threshold time from a photography command reception time point, is found in the buffer, and generating at least one of the stored first resolution image images as the result image when the second resolution input image, which is stored within the threshold time from the photography command reception time point, is not found in the buffer.