According to the similarities and differences of the control means and principles, the dimming glass can realize the transparent and opaque state switching of the glass by means of electronic control, temperature control, light control, voltage control and the like. Due to a variety of conditions, at present, the production of dimming glass on the market is almost all electrically controlled dimming glass. The principle of electronic dimming glass is easy to understand: when the electronic product power off, electric controlling distribution of liquid crystal molecules inside the optical glass will appear irregular, so that the light can not let into the electronic glass is opaque appearance; although the dimming glass prices have just come out by tens of thousands of dollars per square meter is down to each square meters less than million yuan, but due to the high cost, the price has been relatively light glass is still at a high level, which also determines the application field of multi positioning in the high-end market.