A pointing device is provided. A sensor generates a motion detection signal by sensing motion. A calculator receives the motion detection signal, calculates a motion value based on the motion detection signal, calculates a conversion motion value base on an angle of the motion value, and outputs the conversion motion value. An interface outputs the motion conversion value inputted from the calculator. By limiting a motion angle, the pointing device can provide a positioning operation suitable for a motion intended by a user. The user can optionally use a motion control method in all directions according to need.