The present invention discloses a low-power wireless communication method. The method comprises the steps of sending a wake-up data packet to a fault indicator at every other preset period of time by a communication terminal; testing whether a data packet is in the air or not by the fault indicator; if yes, judging whether the data packet in the air is a wake-up data packet or not; if the data packet in the air is a wake-up data packet, starting the wireless reception mode by the fault indicator. The above method reduces the power consumption of the fault indicator and prolongs the service life.