An electronic device includes a case that is capable of controlling colors. The electronic device includes a case containing thermochromic pigments. The case includes a plurality of thermoelectric elements disposed at an internal surface. The case is coupled to a power source unit that supplies power to the plurality of thermoelectric elements and a temperature sensor that measuring a temperature of the plurality of thermoelectric elements. The electronic device includes an input unit for setting a color of the case and a controller for controlling power supply of the power source unit such that a temperature of the plurality of thermoelectric elements measured by the temperature sensor is included in a temperature range corresponding to a color input from the input unit.