1. A controlling method for a handheld communication device, comprising: detecting a tilting state of the handheld communication device at a fixed interval by using a G-sensor; determining whether the tilting state is changed from a face up state to a face down state, the method of determining comprising: determining whether the tilting state is in the face up state; continuing to determine whether the tilting state is changed to the face down state when the tilting state is determined in the face up state; determining whether a number of times that the tilting state is continuously determined in the face down state exceeds a preset value when the tilting state is determined to be changed to the face down state; and confirming that the tilting state is changed from the face up state to the face down state when the number of times exceeds the preset value; and controlling the handheld communication device to perform a function when the tilting state is confirmed to be changed from the face up state to the face down state.