An electronic device may include a main body; a rotary member rotatably mounted upon and enclosing at least a portion of the main body, the rotary member including a first region corresponding to a first attribute and a second region corresponding to a second attribute, the first and second regions being alternately arranged on one face of the rotary member; a sensor module configured to acquire attribute information corresponding to at least a partial region of the rotary member as the rotary member is rotated; and a processor, wherein the processor is configured to confirm a change in at least one of the first attribute and the second attribute and to determine at least one of a rotated angle and a rotated direction of the rotary member based on the change.