A method for determining a frame rate in a display electronic device, the method comprising: displaying, based on a frame rate, first display data, comparing the first display data displayed at a first time and second display data to be displayed at a second time later than the first time; determining a frame rate based on the comparison result, and displaying, based on the determined frame rate, the second display data, wherein the comparing of the first display data and the second display data comprises: identifying a number of changed pixels in a reference area of the first display data and the second display data; and determining whether the number of changed pixels in the reference area is greater than or equal to a reference number, wherein the determining of the frame rate comprises: increasing the frame rate if the number of changed pixels in the reference area is greater than or equal to the reference number, and decreasing or maintaining the frame rate if the number of changed pixels in the reference area is not greater than or equal to the reference number. displaying, based on a frame rate, first display data, comparing the first display data displayed at a first time and second display data to be displayed at a second time later than the first time; determining a frame rate based on the comparison result, and displaying, based on the determined frame rate, the second display data, wherein the comparing of the first display data and the second display data comprises: identifying a number of changed pixels in a reference area of the first display data and the second display data; and determining whether the number of changed pixels in the reference area is greater than or equal to a reference number, wherein the determining of the frame rate comprises: increasing the frame rate if the number of changed pixels in the reference area is greater than or equal to the reference number, and decreasing or maintaining the frame rate if the number of changed pixels in the reference area is not greater than or equal to the reference number. determining a frame rate based on the comparison result, and displaying, based on the determined frame rate, the second display data, wherein the comparing of the first display data and the second display data comprises: identifying a number of changed pixels in a reference area of the first display data and the second display data; and determining whether the number of changed pixels in the reference area is greater than or equal to a reference number, wherein the determining of the frame rate comprises: increasing the frame rate if the number of changed pixels in the reference area is greater than or equal to the reference number, and decreasing or maintaining the frame rate if the number of changed pixels in the reference area is not greater than or equal to the reference number. identifying a number of changed pixels in a reference area of the first display data and the second display data; and determining whether the number of changed pixels in the reference area is greater than or equal to a reference number, wherein the determining of the frame rate comprises: increasing the frame rate if the number of changed pixels in the reference area is greater than or equal to the reference number, and decreasing or maintaining the frame rate if the number of changed pixels in the reference area is not greater than or equal to the reference number. increasing the frame rate if the number of changed pixels in the reference area is greater than or equal to the reference number, and decreasing or maintaining the frame rate if the number of changed pixels in the reference area is not greater than or equal to the reference number.