Disclosed are an eye-tracking-based image transmission method, device and system. The eye-tracking-based image transmission method enables: receiving multiple images acquired from multiple cameras; generating a synthesized image on the basis of the multiple images; displaying the synthesized image on a screen; detecting the gaze of a user in real-time; selecting, from the synthesized image, the image corresponding to an area at which the user is gazing; and transmitting the selected image. Thus, an image that dynamically changes according to the gaze of a user may be provided via broadcasting.