A pointing device cooperates with a display device which shows a cursor moving in response to a movement of the pointing device. The pointing device includes a casing, a sensing unit and a modulation structure. The sensing unit senses a first movement of the pointing device to acquire first movement information when the sensing unit is arranged in a first position. The modulation structure connected with the sensing unit adjusts the sensing unit from the first position to a second position. Then, the sensing unit senses the first movement of the pointing device to acquire second movement information when the sensing unit is arranged in the second position. The moving path of the cursor is shown on the display device according to the first movement information or the second movement information.