An operating device for a loading crane comprising: - a crane control means for controlling actuators of the loading crane based on control commands and for evaluating sensor signals from sensors of the loading crane and for generating sensor data on the basis of the sensor signals, - an input device which is spatially separate from the crane control means for the input of control commands for the crane control means, wherein - the crane control means has a first telecommunication device for exchange of data signals with the input device, wherein the data signals delivered by the crane control means include sensor data, - the input device has a second telecommunication device for exchange of data signals with the first telecommunication device, wherein the data signals delivered by the input device include control commands, - the input device has a transmitting device for the delivery of data signals, - there is provided a signalling device which is spatially separate from the input device and which can be worn by a user on the body and which has a receiving device for receiving data signals delivered by the transmitting device and a displaying device by which audio data and/or image data can be displayed, wherein the signalling device signals the audio data and/or image data to a user, characterised in that either - data signals delivered by the crane control means include sensor data and the input device outputs said sensor data to the signalling device by means of the transmitting device and the signalling device has a processor which generates the audio data and/or image data on the basis of said sensor data, or - the input device has a processor which generates the audio data and/or image data on the basis of the sensor data delivered by the crane control means and delivers same by means of the transmitting device to the signalling device, or - the crane control means has a processor which generates audio data and/or image data on the basis of the sensor data and outputs same by means of the first and second telecommunication devices (4, 5) to the input device and the input device delivers the audio data and/or image data to the signalling device by means of the transmitting device. - a crane control means for controlling actuators of the loading crane based on control commands and for evaluating sensor signals from sensors of the loading crane and for generating sensor data on the basis of the sensor signals, - an input device which is spatially separate from the crane control means for the input of control commands for the crane control means, - the crane control means has a first telecommunication device for exchange of data signals with the input device, wherein the data signals delivered by the crane control means include sensor data, - the input device has a second telecommunication device for exchange of data signals with the first telecommunication device, wherein the data signals delivered by the input device include control commands, - the input device has a transmitting device for the delivery of data signals, - there is provided a signalling device which is spatially separate from the input device and which can be worn by a user on the body and which has a receiving device for receiving data signals delivered by the transmitting device and a displaying device by which audio data and/or image data can be displayed, wherein the signalling device signals the audio data and/or image data to a user, - data signals delivered by the crane control means include sensor data and the input device outputs said sensor data to the signalling device by means of the transmitting device and the signalling device has a processor which generates the audio data and/or image data on the basis of said sensor data, or - the input device has a processor which generates the audio data and/or image data on the basis of the sensor data delivered by the crane control means and delivers same by means of the transmitting device to the signalling device, or - the crane control means has a processor which generates audio data and/or image data on the basis of the sensor data and outputs same by means of the first and second telecommunication devices (4, 5) to the input device and the input device delivers the audio data and/or image data to the signalling device by means of the transmitting device.