An image processing and displaying method, AR device, image processing device, and a display system are provided. The image processing and displaying method is applied to a display system, wherein the display system includes an Augmented Reality (AR) device and an image processing device, and the image processing and displaying method includes: acquiring, by the AR device, a real-time image of a current view field of a user wearing the AR device in a real environment; sending, by the AR device, the real-time image to the image processing device; receiving, by the AR device, a display direction, an imaging distance, and a target image sent by the image processing device, and displaying, by the AR device, the target image in a virtual display area according to the display direction and the imaging distance.