Touch sensing method and system using same

The invention provides a touch sensing method and a system using the same. The touch sensing system comprises a touch interface and a control unit, wherein, the touch interface senses at least one boundary change of at least one corresponding area of at least one object on the touch interface; and the control unit defines a touch gesture of the corresponding object according to the boundary change so as to execute a touch operation corresponding to the touch gesture. In addition, the invention further provides the touch sensing method. In the method, the touch gestures such as a mobile gesture, a rotating gesture, a turnover gesture, an enlargement gesture or a reduction gesture are judged based on the change of a touch area.