A setting value change device (50, 500) that is configured to perform change processing to change a temperature setting value of a refrigeration apparatus and/or a heating apparatus (10a, 1Gb), the setting value change device (50, 500) comprising: a touchscreen device that functions as display that is configured to display the temperature setting value and fulfills a role as a touch sensor that is configured to detect a touch operation on the display; and a controller connected to the display and the touch sensor; characterized in that the controller is configured to perform change processing to cause the display to display a drag button and a movement path on which the drag button moves, provide, on the touch sensor, a drag area that detects a drag input on the drag button and a reference point disposed at a location off the movement path, set the drag area larger than a display range of the movement path, move the drag button to a crossing point where a straight line or a specific curve connecting the reference point to a drag operation position (P1, P2) in the drag area crosses the movement path, change the temperature setting value to a value corresponding to a position of the drag button, cause the display to display an operation button near the movement path, and performs settings to enable the touch sensor to detect and input a touch operation on the operation button; and when the drag button is being dragged, expand the drag area up to a range in which the operation button is displayed so that a change operation of the temperature setting value is continued even if there is a touch operation on the operation button; wherein the controller is further configured to set a cancel area such that if the cancel area is touched at a time of the drag operation of the drag button, the change processing of the temperature setting value is not continued and the drag operation is ended, cause the display to display the movement path as a non-linear shape; cause the display to display the movement path as a circular arc shape or an elliptical arc shape, and dispose the cancel area at a position surrounded by the movement path. a touchscreen device that functions as display that is configured to display the temperature setting value and fulfills a role as a touch sensor that is configured to detect a touch operation on the display; and a controller connected to the display and the touch sensor; characterized in that the controller is configured to perform change processing to characterized in that the controller is configured to perform change processing to cause the display to display a drag button and a movement path on which the drag button moves, provide, on the touch sensor, a drag area that detects a drag input on the drag button and a reference point disposed at a location off the movement path, set the drag area larger than a display range of the movement path, move the drag button to a crossing point where a straight line or a specific curve connecting the reference point to a drag operation position (P1, P2) in the drag area crosses the movement path, change the temperature setting value to a value corresponding to a position of the drag button, cause the display to display an operation button near the movement path, and performs settings to enable the touch sensor to detect and input a touch operation on the operation button; and when the drag button is being dragged, expand the drag area up to a range in which the operation button is displayed so that a change operation of the temperature setting value is continued even if there is a touch operation on the operation button; provide, on the touch sensor, a drag area that detects a drag input on the drag button and a reference point disposed at a location off the movement path, set the drag area larger than a display range of the movement path, move the drag button to a crossing point where a straight line or a specific curve connecting the reference point to a drag operation position (P1, P2) in the drag area crosses the movement path, change the temperature setting value to a value corresponding to a position of the drag button, cause the display to display an operation button near the movement path, and performs settings to enable the touch sensor to detect and input a touch operation on the operation button; and when the drag button is being dragged, expand the drag area up to a range in which the operation button is displayed so that a change operation of the temperature setting value is continued even if there is a touch operation on the operation button; wherein the controller is further configured to set a cancel area such that if the cancel area is touched at a time of the drag operation of the drag button, the change processing of the temperature setting value is not continued and the drag operation is ended, cause the display to display the movement path as a non-linear shape; cause the display to display the movement path as a circular arc shape or an elliptical arc shape, and dispose the cancel area at a position surrounded by the movement path. set a cancel area such that if the cancel area is touched at a time of the drag operation of the drag button, the change processing of the temperature setting value is not continued and the drag operation is ended, cause the display to display the movement path as a non-linear shape; cause the display to display the movement path as a circular arc shape or an elliptical arc shape, and dispose the cancel area at a position surrounded by the movement path.