An integrated independent air conditioning system may include a refrigerant line, including a compressor, a condenser, and an evaporator core, a Peltier heat exchanger to perform air conditioning through a Peltier element, a ventilated seat for a vehicle in which a blower and a heat exchanger are arranged, a cooling circulation line arranged such that coolant passes through a first pump, the evaporator core, an on-off valve, the Peltier heat exchanger, and a first 3-way valve, a seat circulation line that passes through the heat exchanger and joins an upper side of the first pump, a heating circulation line arranged such that coolant passes through a second pump, the condenser of the refrigerant line, a second 3-way valve, the Peltier heat exchanger, and the first 3-way valve, a radiator circulation line that passes through a radiator, and joins an upper side of the second pump, and a controller.