Structurally, the frame and hanging position must be determined by linearity according to designing purpose. On the surface of wall and cylinder, the standard height line must be drawn according to the height of ceiling. The derivation is controlled within ±5mm. Place the expanding bolts at the position of suspender and then connect the suspender to the expanding bolts to make it stabilized. Place hangers and embeddings in the ceiling and then connect the suspender to the hangers. Or weld the embeddings and the suspender together and then stabilize the frame by suspender. During the installation of frame, the frame is connected to suspender first, during which it is penetrated and stabilized by screws. And then adjust the position of frame according to the standard height line, so that it levels up. The hanging interval of main frame is determined by the designed position. The middle part is bulged out. The bulging should be no less than 1/2000th of the short width of the room. The minor frame is stabilized on the peripheral walls according the standard height line. After he major and minor frame is installed, adjust the position and level of major and minor frame. The derivation of connections between major and minor frame should be no larger than 2mm. When the suspender confronts other equipment, adjust the hanging position and use more suspenders to make sure that there are enough hanging positions on the ceiling. Before installing plasterboard and aluminum plates, their position must be preserved. And the patterns and arrangement must fulfill designing purpose.