1. A surgical robot system, comprising: a slave system to perform a surgical operation upon a object; a master system to control the surgical operation of the slave system; and an imaging system to generate the virtual image of an inside of the object; and an augmented reality image display system comprising: a camera to capture a real image of the object and a plurality of markers attached to the object, an augmented reality image generator to detect a plurality of markers in the real image, to estimate a position and gaze direction of the camera using the detected markers, and to generate an augmented reality image by overlaying a region of a virtual image corresponding to the estimated position and gaze direction of the camera over the real image, and a display to display the augmented reality image.