A cosmetic or dermatological system includes a packaging and dispenser device containing one or more compositions from which the dispensed preparation is prepared, a surroundings sensor that is suitable for delivering at least information associated with a physical magnitude of the surrounding environment of the device, an adjustment system that is coupled to or suitable for coupling to the packaging and dispenser device, and that enables at least one characteristic of the dispensed preparation to be varied, and a processor for automatically controlling the adjustment system as a function of data delivered by the surroundings sensor or for informing the user, as a function of the data, about an action to be exerted on the adjustment system.