Abstract: An operating method for a touch display device is provided. The operating method includes the following steps. At least two targets are displayed on a display screen, wherein the at least two targets are circled by a selected range. When a first touch event occurring at a position corresponding to the selected range is detected, a control function is activated for the at least two targets in the selected range until the first touch event is not detected. When the control function is activated, whether a second touch event occurs is detected. When the control function is activated and the second touch event occurs, different control actions are performed respectively to the at least two targets in the selected range according to the behavior of the second touch event.