An image display device and image display method are provided. The device and method can prevent changes in image density and contrast, which are caused by repeated displaying over long periods of time and changes in environment, by employing accurate electric current detection, due to the following operations. Voltage measurement is initiated with a detection circuit. Next, the application of drive voltage is initiated with a drive power source. An electric current value is calculated from the measured voltage value and the electric current value is temporarily stored. The electric current values are stored every set amount of time and the storage thereof accumulates. Application of the drive voltage is terminated and the integral value of the electric current is calculated in accordance with formulas.