The disclosure provided an operating method and an electronic device thereof. The electronic device is configured to predict user's next action and automatically launching or starting an application program without user's input. The electronic device detects an occurrence of a clamping action based on sensor data obtained from at least one sensor on one side of the electronic device. Upon detection of a constant pressure through the sensor data, the electronic device executes a first triggering operation (clamping action) and not execute a second triggering operation (squeeze action). Further, a clamping pattern corresponding to the clamping action is identified based on the sensor data outputted by the at least one sensor. Then, the electronic device automatically launches or starts an application program associated to the identified clamping pattern without user's input through a touch display.