An image display system is provided. The image display system includes a host, and a touch controller configured to generate touch event information corresponding to a touch signal and supply the touch event information to an accelerator, wherein the touch signal is output from a touch panel. The accelerator is configured to generate, based on the touch event information supplied from the touch controller, output image data corresponding to a touch event. The image display system further includes a display controller configured to supply the output image data generated by the accelerator to a display panel.