An air conditioning system for a vehicle passenger compartment, the vehicle passenger compartment defining a vehicle interior and a vehicle exterior, the air conditioning system comprising: - an air conditioning device adapted to adjust an interior temperature (Ti) of the vehicle interior to a setpoint temperature (Tc) by heating or cooling interior air and/or exterior air, the air conditioning device comprising at least one exterior air inlet and shut-off means for the exterior air inlet, the shut-off means being movable between a shut position, in which said shut-off means prevents the flow of air between the exterior and the interior of the vehicle, and a flow position, in which said shut-off means allow the flow of air; - a control device for the air conditioning device, comprising: - an acquisition module configured to acquire status information from the passenger compartment, the status from the passenger compartment being either an operational status or a standby status, - a control module configured to control the air conditioning device based on the status from the passenger compartment; the control module being configured to control the closing of the shut-off means so that the shut-off means are in the shut position when the acquired passenger compartment status information corresponds to the standby status, characterised in that the acquisition module is further configured to acquire information corresponding to an outside temperature (Te) from the exterior of the vehicle, the control device further comprising a determination module configured to determine the setpoint temperature (Tc) as a function of the information corresponding to the acquired outside temperature (Te) and the acquired passenger compartment status information, the setpoint temperature (Tc) being an operational setpoint temperature (Tco) for acquired passenger compartment status information corresponding to an operational passenger compartment status and a standby setpoint temperature (Tca) for acquired passenger compartment status information corresponding to a standby passenger compartment status, the control module being further configured to control the air conditioner based on the determined setpoint temperature (Tc), wherein the deviation between the standby setpoint temperature (Tca) and the outdoor temperature (Te) is less than or equal to the deviation between the operational setpoint temperature (Tco) and the outdoor temperature (Te), within an operating temperature range of the air conditioning system. - an air conditioning device adapted to adjust an interior temperature (Ti) of the vehicle interior to a setpoint temperature (Tc) by heating or cooling interior air and/or exterior air, the air conditioning device comprising at least one exterior air inlet and shut-off means for the exterior air inlet, the shut-off means being movable between a shut position, in which said shut-off means prevents the flow of air between the exterior and the interior of the vehicle, and a flow position, in which said shut-off means allow the flow of air; - a control device for the air conditioning device, comprising: - an acquisition module configured to acquire status information from the passenger compartment, the status from the passenger compartment being either an operational status or a standby status, - a control module configured to control the air conditioning device based on the status from the passenger compartment; - an acquisition module configured to acquire status information from the passenger compartment, the status from the passenger compartment being either an operational status or a standby status, - a control module configured to control the air conditioning device based on the status from the passenger compartment;