Disclosed is an MEA in which a catalyst layer is coated on both sides of an ion exchange membrane. An ion exchange membrane support film is attached on both sides of an edge portion of the ion exchange membrane, and a PCB is mounted on one surface of the ion exchange membrane support film along an outer line of the catalyst layer of the MEA. Furthermore, a PCB terminal is formed on one end of the PCB, and a connector is connected to the PCB terminal to communicate with an external controller. The PCB includes a heating element, a first temperature sensor measuring the temperature of the heating element, a second temperature sensor measuring the temperature of the MEA, a first contact measuring the resistance of unit cells, and a second contact measuring the voltage of the unit cells, formed in a predetermined arrangement to communicate with the PCB terminal.