The double glazed smart glass, also called isolating smart glass, is an innovative opto-electrical double glazed glass that presents different visual state by controlling the voltage. When no voltage is applied, the glass is opaque and when voltage is applied, the glass turns transparent. It consists of two pieces of glass, one of which was affixed with a smart film, being separated evenly by spacer and sealed around the surroundings. Among the two pieces of glass, a dry air space is formed, not only providing protection for the smart film but also enabling the glass to have good sound insulation and heat resistance features.