Method for treating objects with a medium, in particular a liquid, comprising the following steps of: - applying the medium to the surface to be treated of the object placed on a holder with the aid of an application device with a nozzle, to which the medium is supplied by a line and which is rigidly connected to actuators via a device and is moved relative to the object to be treated over the surface of the object to be treated via the actuators, wherein the position of the nozzle is detected by incremental encoders which are assigned to the actuators, regulating properties of the medium to be applied to the object to be treated depending on the position of the nozzle relative to the surface of the object to be treated, - regulating the temperature of the medium to be applied to the object to be treated with the aid of the control circuit, wherein the temperature is detected with the aid of a temperature sensor which is assigned to the line immediately upstream of the nozzle and supplies the control circuit with data relating to the temperature of the medium detected by it, - feeding the position of the nozzle detected by the incremental encoders and the temperature of the medium detected by the temperature sensor to a control circuit and regulating the temperature of the medium and/or the quantity of medium fed to the nozzle in the unit of time with the control circuit, for which purpose a device for regulating the quantity of medium flowing through the line in the unit of time and devices (2, 3) for heating and cooling the medium are assigned to the line for the medium, which devices (2, 3, 4) are functionally connected to the control circuit. - applying the medium to the surface to be treated of the object placed on a holder with the aid of an application device with a nozzle, to which the medium is supplied by a line and which is rigidly connected to actuators via a device and is moved relative to the object to be treated over the surface of the object to be treated via the actuators, wherein the position of the nozzle is detected by incremental encoders which are assigned to the actuators, regulating properties of the medium to be applied to the object to be treated depending on the position of the nozzle relative to the surface of the object to be treated, - regulating the temperature of the medium to be applied to the object to be treated with the aid of the control circuit, wherein the temperature is detected with the aid of a temperature sensor which is assigned to the line immediately upstream of the nozzle and supplies the control circuit with data relating to the temperature of the medium detected by it, - feeding the position of the nozzle detected by the incremental encoders and the temperature of the medium detected by the temperature sensor to a control circuit and regulating the temperature of the medium and/or the quantity of medium fed to the nozzle in the unit of time with the control circuit, for which purpose a device for regulating the quantity of medium flowing through the line in the unit of time and devices (2, 3) for heating and cooling the medium are assigned to the line for the medium, which devices (2, 3, 4) are functionally connected to the control circuit.