A multi-display device is configured to display an image, and the multi-display device includes display modules sequentially connected according to a prescribed connection configuration. Each of the display modules may include a signal input unit for acquiring an image signal and control information and a partial image selection unit for obtaining, from the control information, information about the connection configuration of the display modules, wherein each display module selects a partial image corresponding to the display module, from the image signal by referring to a first lookup table based on the information about the connection configuration.