NOVELTY - The controller e.g. in-vehicle charge electronic controller (22) and air-conditioning electronic controller (23), has a stopping unit (22a4) for stopping control or operation of an in-vehicle device to stop operation of a high-voltage source i.e. main battery (11A), upon detection of opening of an openable unit e.g. door, bonnet and boot lid, of a vehicle by an open/close sensor (18a). The high-voltage source is placed below a floor of the vehicle. A maintenance hole for maintenance of the high-voltage source is placed in the floor of the vehicle above the high-voltage source.    USE - Controller e.g. in-vehicle charge electronic controller and air-conditioning electronic controller, for controlling an in-vehicle device e.g. main battery charger, auxiliary battery charger, air-conditioner, audio/navigation system, rear defogger, lamp and door mirror, for operating a high-voltage source i.e. main battery (all claimed), installed in a vehicle i.e. automobile. Can also be used for a windshield wiper.    ADVANTAGE - The controller prevents a charge gun from being inserted into a charge plug when the auxiliary battery is charged by the main battery and the preliminary air-conditioning is carried out with the main battery such that the operator cannot control the charge of the auxiliary battery and the preliminary air-conditioning, so that unexpected operation of the high-voltage source is avoided by a control logic without hearing a load on the operator. The controller enhances convenience of the automobile if preliminary air-conditioning and electrical charge are carried out automatically at timings set by a timer in advance. The controller allows charge of the main battery and the auxiliary battery to be started or stopped by remote control and start/stop of the charge to be carried out in accordance with a predetermined schedule, so that the charge can be readily controlled in the vehicle used at regular timing.    DETAILED DESCRIPTION - The in-vehicle device is selected from a group consisting of a main battery charger (22A), an auxiliary battery charger (22B) and an air-conditioner (12).    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of main components of an in-vehicle device controller and a remote control system for in-vehicle devices including the in-vehicle device controller.    Main battery (11A)    Air-conditioner (12)    Open/close sensors (18a, 18b)    In-vehicle charge electronic controller (22)    Stopping units (22a4, 22b4, 23D)    Main battery charger (22A)    Auxiliary battery charger (22B)    Air-conditioning electronic controller (23)