Abstract: A method for modular display frame is provided. The method includes the following steps. A number of display devices are combined to form a composite screen. A directional code including a number of positioning marks is displayed on each display device. The directional code displayed on each display device is scanned. Orientation information of each display device is obtained. A unique pattern is displayed on each display device. The composite screen is captured to generate a first image. Spatial location information of each display device is obtained from the first image. A number of display parameters corresponding to the display devices are calculated according to the orientation information and the spatial location information of the display devices. The display parameters are transmitted to the display devices. Each display device displays a regional frame according to the display parameters of the corresponding display device.