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There are two issues in our windows: firstly, it’s difficult to clean the outside glass of window, and easy to produce safety hazards when cleaning; secondly, the windows maximum inlet area is only half of the window. Through increase universal rotating ball between the window frames and the window sash frame,. With the change of the angle and position of the sash, the rotation center of the sash window frame to move in the window frame. The sash can be rotated 360 degrees, it can move and sliding to front, back, left and right. It can adjust the angle and area of the wind effectively, and also solve the inconvenience of cleaning troubles.