Smart Glass, is one of architectural specialty glass, also known as the electrochromic glass. It can adjust the glass transmittance through electric current force, which is a great helper for adjusting the outside light into interior. Through the change of electric current, it can control the color and depths of color, and control and adjust the intensity of the sun shining into the room to make room soft, comfortable and pleasant. Current in architectural decorative glass in the world, it is mainly used in the need for confidentiality or privacy protection for building site. The window glass made by it is equivalent to an electric control device window curtains, comfortable and convenience. It not only has self changeable functions of light transmittance in window and door glass, also occupies few space in the doors and windows, which saves the space of setting the window.