Provided is a CT system having a cooling system. The CT system may include a gantry unit including: a rotor； and an assembly component； an intake provided on a first surface of the rotor； and an outtake provided on a second surface opposite to the first surface of the rotor, wherein the gantry unit is cooled by air moving through the intake and the outtake due to a rotation force or a centrifugal force generated by a rotation movement of the rotor.
