Provided are an edge data network for streaming a virtual reality (VR) image and a device for displaying a VR image. An example method, performed by the edge data network, of streaming a VR image includes receiving gaze information of a user viewing the VR image from a device, determining at least a partial region among all of regions of the VR image as an artificial intelligence (AI) scaling target region of the VR image, based on the gaze information, determining an AI scaling change level for the AI scaling target region, performing a scaling change on a region corresponding to the AI scaling target region among the regions of the VR image obtained from a media server, according to the AI scaling change level, generating VR image data including the AI scaling target region, and streaming the VR image data to the device.