A substrate processing system includes a substrate loading unit which loads a plurality of substrates, a substrate transfer unit which transfers N (where N is natural number) substrates at the same time from the substrate loading unit, and a substrate processing unit including a plurality of process chambers which receives the N substrates at the same time from the substrate transfer unit and processes the received substrates where each of the process chambers includes a stage on which the N substrates are disposed and an insulation layer disposed between the N substrates.