A system, method and device for controlling security of a beacon. The system includes a beacon device configured to broadcast a beacon identifier, and change the beacon identifier to another beacon identifier and to broadcast the other beacon identifier when a request to change the beacon identifier is received. The control device is configured to map and store the beacon identifier and service information and provide the service information to a terminal device that has received the beacon identifier and has accessed the control device. The control device also provides information on the other beacon identifier to replace the beacon identifier, and utilize the other beacon identifier to retrieve the service information for preventing an unauthorized user from changing information and enhance information security.