1. A method for acquiring an image in an electronic device, the method comprising: acquiring a first image using an image sensor that comprises a plurality of first pixels having a temporary first exposure and a plurality of second pixels having a temporary second exposure; detecting a reference exposure value based on information of the first image; adjusting at least one of the first exposure or the second exposure based on the reference exposure value; and acquiring a second image using the image sensor based on the adjusted at least one of the first exposure or the second exposure, wherein the information of the first image includes at least one of a weight corresponding to a location of the electronic device and a face detection auto exposure, wherein the adjusting of the at least one of the first exposure or the second exposure comprises: comparing a reference range corresponding to the reference exposure value with the first exposure and the second exposure; and adjusting at least one, outside the reference range, of the first exposure or the second exposure based on the compared result to be a maximum value of the reference range.