Abstract: A nerve stimulation system includes an electrode, an electrode controlling device coupled to the electrode and configured to control the electrode to electrically stimulate a peripheral nerve according to a nerve stimulation signal, and a signal generating device coupled to the electrode controlling device and configured to generate the nerve stimulation signal. The nerve stimulation signal is a signal with a square envelope. The square envelope periodically includes an on-time period with a pulse amplitude and an off-time period without the pulse amplitude, and a ratio of the on-time period and the off-time period is not less than 1, and a length of the off-time period is not longer than 5 seconds.