Abstract: A device for controlling the operation of a vacuum toilet has a control computer integrated below the toilet seat, timecontrolledunits such as vacuum and compressed air generators with their corresponding closing and opening valves, and sensors for temperature, pressure and flow. An accessory control appliance or hand terminal is connectable to the control computer by a standardised interface, may control all required functions in parallel with the control computer, and allows manual input of the operation parameters. Device is also provided for outputting the content of a control device storage unit integrated into the control computer and storing over any time period the values for the operations effected.