A coordinating apparatus for coordinating data transmission between a data providing device and a display device is provided. The display device conforms to a transmission standard. The coordinating apparatus includes a programmable coordinating module and an outputting module. The programmable coordinating module is programmed according to the transmission standard. The programmable coordinating module is used for receiving M bits of image data from the data providing device, extracting N bits of image data among the M bits of image data, and arranging the N bits of image data into N bits of arranged data. The outputting module is used for outputting the N bits of arranged data to the display device.