A display method of an image is disclosed. A position of a vergence surface of a user is obtained through a gaze tracking device. An image is provided by a display, the image is located at a virtual image surface, and the image has an offset between different view directions. A controller is coupled to the gaze tracking device and the display. The controller receives an information of the position of the vergence surface obtained through the gaze tracking device, performs an algorithm processing according to the information to obtain the offset, and transmits a display information including the offset to the display. An eye of the user focuses on an accommodation surface when viewing the image, and a position of the accommodation surface is different from a position of the virtual image surface.