Mother monitoring device and monitoring method executed by mother monitoring device with adjustable monitoring range

The invention discloses a mother monitoring device and a monitoring method executed by the mother monitoring device with an adjustable monitoring range. The monitoring method is used for monitoring a sub monitoring device and comprises the steps of receiving a control instruction, adjusting the transceiver power value of a wireless transceiver module according to the control instruction, controlling the wireless transceiver module to emit a wireless monitoring signal based on the transceiver power value, judging whether a wireless feedback signal returned by the sub monitoring device based on the wireless monitoring signal is received or not, and executing a warning action when the wireless feedback signal is not received.