A robot system including a surgical robot inserted into a subject may include: a photographing device that is disposed on an end portion of the surgical robot, is inserted into a body part of the subject, which is to be treated, and captures a real-time image with a resolution at which the body part to be treated may be observed in units of cells; a control device that receives a control signal for controlling the surgical robot by referring to the real-time image received from the photographing device; and an energy generating device that is disposed adjacent to the photographing device, and transmits energy to a region corresponding to the body part to be treated which is being photographed by the photographing device according to the control signal.