The present invention relates to a method and apparatus for detecting an abnormal state of a beacon device in a wireless mesh network and a recording medium storing a computer program for executing the method. The present invention may monitor service traffic for each beacon device, detect a beacon that does not operate normally according to a change in the amount of service traffic, and prevent interference using a state check message, and thus efficiently manage a wireless mesh network. The present invention may also upgrade firmware of the beacon device in the wireless mesh network without stopping networking.