A thermal regulation method, for a vehicle of the motor vehicle type, said regulation being provided by a heat-transfer fluid travelling through a closed hydraulic circuit including - an electric fluid pump, - a means for thermally regulating said fluid, - a heat exchanger through which said fluid passes, said method comprising steps in which - a passenger compartment temperature is measured, characterized in that - the passenger compartment temperature is compared to a first predefined temperature, and - when said temperatures are different, said circuit is controlled (64; 66; 67) until said temperatures are substantially equal; - the battery is recharged by connecting it to an exterior electrical energy source, - the charge of said battery is measured (57; 66), and - when the battery is totally charged, the exterior electrical energy source is used for controlling the hydraulic circuit; - a departure time of the vehicle is planned, - a necessary duration is calculated for thermally regulating the heat engine and/or the passenger compartment, - a start-up time is determined of the controlling of the hydraulic circuit, - said controlling is started up (60; 62; 64) at the determined time, - the actual arrival time of the driver is compared with the planned time, and - when the vehicle departs before or at the planned time, the electrical energy of the battery is used for controlling the hydraulic circuit until the battery reaches a predetermined charge level, beginning from which the internal combustion engine is started up, - when, at the planned time, the vehicle has not yet departed, said control is maintained for a predefined duration, at the end of which - when the vehicle has departed, the electrical energy of the battery is used to control the hydraulic circuit until the battery reaches said charge level, - when the vehicle has not departed, said control is stopped. - an electric fluid pump, - a means for thermally regulating said fluid, - a heat exchanger through which said fluid passes, - a passenger compartment temperature is measured, - the passenger compartment temperature is compared to a first predefined temperature, and - when said temperatures are different, said circuit is controlled (64; 66; 67) until said temperatures are substantially equal; - the battery is recharged by connecting it to an exterior electrical energy source, - the charge of said battery is measured (57; 66), and - when the battery is totally charged, the exterior electrical energy source is used for controlling the hydraulic circuit; - a departure time of the vehicle is planned, - a necessary duration is calculated for thermally regulating the heat engine and/or the passenger compartment, - a start-up time is determined of the controlling of the hydraulic circuit, - said controlling is started up (60; 62; 64) at the determined time, - the actual arrival time of the driver is compared with the planned time, and - when the vehicle departs before or at the planned time, the electrical energy of the battery is used for controlling the hydraulic circuit until the battery reaches a predetermined charge level, beginning from which the internal combustion engine is started up, - when, at the planned time, the vehicle has not yet departed, said control is maintained for a predefined duration, at the end of which - when the vehicle has departed, the electrical energy of the battery is used to control the hydraulic circuit until the battery reaches said charge level, - when the vehicle has not departed, said control is stopped. - when the vehicle has departed, the electrical energy of the battery is used to control the hydraulic circuit until the battery reaches said charge level, - when the vehicle has not departed, said control is stopped.