The invention provides an image transfer device and an image transfer method. The image transfer device obtains an image file that includes first image data and identification information for identifying an image generation device used to generate the first image data, and obtains the identification information from the obtained image file. The image transfer device determines a display resolution of a monitor included in the image generation device, according to the obtained identification information, converts the first image data to second image data having a resolution consistent with the determined display resolution, and records the second image data into a storage device. The image transfer device transfers the obtained image file to a first device connected to the network.