The invention discloses an information technology building exterior wall computer display device. The information technology building exterior wall computer display device comprises four displayer fixing brackets mounted on a building exterior wall. Displayer fixing frames are welded to the outer walls of one ends of the four displayer fixing brackets. Bearing seats are welded to the tops of the inner walls on two sides of the displayer fixing frames. Rotating shafts are inserted in the inner walls of the two bearing seats. Rotary connection is formed between the rotating shafts and the bearing seats. Annular installation grooves are formed in the inner walls on two sides of the displayer fixing frames. Annular guide rails are welded to the inner walls of the annular installation grooves.First transmission gears mesh with the interiors of the annular guide rails. Stable fixing function can be conducted to a displayer body, a display plane can be changed, and disturb to the displayer body based by external ambient light is avoided. Through information spreading and receiving of a user or a viewer, the driving and guide function to a cleaning wiper can be carried out, and glass panel exterior cleaning degree can be guaranteed.