The windowpane is an important collecting sunlight part of building, and also a part that loses most heat.How to increase absorbing heat and decrease losing heat of the windowpane is the key problem of the construction saving energy technology. The intelligence glass can auto control transmissivity with varying temperature outside the room.When temperature outside the room is above 25 ℃, the transmissivity of the windowpane is decreased with increasing of temperature outside the room. The composition of the intelligence glass and its temperature varying cove with outside the room on the basis of testing result for the windowpane were introduced.