The present invention provides an integrated control apparatus for a heating, ventilating, and air conditioning (HVAC) system for a vehicle in which a dual dial structure is applied to a dial type air conditioning control switch.According to the integrated control apparatus for an HVAC system for a vehicle of the present invention, an air flow control knob and a temperature control knob are arranged in a concentric circle such that when the air flow control know is rotated, a blower shaft is thereby rotated to operate a blower switch, and the blower switch turns on or off a blower or controls the rotational speed of the blower, and when the temperature control knob is rotated, a rotating holder is thereby rotated with respect to the blower shaft and the amount of rotation is transmitted to a cable through a pin shaft, a gear shaft, and an internal gear to operate a temperature control cam, thus controlling the interior temperature.