A method of dynamically adjusting a voice suggested distance for global positioning system (GPS) is provided. The method comprises receiving and decoding a GPS signal first by an electronic device, and then obtaining a speed parameter from the GPS signal. Then, a current driving speed is generated by calculating the obtained speed parameter, and a corresponding suggested distance is sought from a built-in table stored in the electronic device based on the current driving speed. Finally, the suggested distance is updated and registered temporarily. Accordingly, the present invention provides a more human GPS navigation function.