An electronic device for controlling a frame rate and a method therefor are provided. The electronic device includes an image sensor, and a processor. The processor is configured to sequentially obtain a first image, a second image, and a third image through the image sensor at a first time interval, generate a synthesized image by using the first image and the third image, identify a similarity between the second image and the synthesized image, sequentially obtain a fourth image, a fifth image, and a sixth image through the image sensor, at a second time interval long than the first time interval, based on the similarity being equal to or greater than a first threshold value, and sequentially obtain the fourth image, the fifth image, and the sixth image through the image sensor, at the first time interval, based on the similarity being less than a first threshold value.