A display system has a single screen configured of plural display devices, and the system comprises: a receiving unit adapted to receive plural pieces of image data; a segmentation unit adapted to segment the received plural pieces of image data in accordance with the arrangement of the plural display devices; a distribution unit adapted to distribute each piece of segmented image data to a display device corresponding thereto; and a process allocation unit adapted to allocate, to each display device, process details to be executed, wherein the process allocation unit changes the process details allocated to each display device based on the amount of time required for the process executed by each display device and/or the amount of data of the process executed by each display device; and the distribution unit distributes each piece of segmented image data in accordance with the changed allocated process details.