The present invention relates to a dual beacon system for a smart safety belt for managing a hazardous area, and more particularly, by mixing a main beacon with a two-way communication module and a sub-beacon with a simple configuration, location information of a worker that cannot be generally identified is output to the warning unit of the smart safety belt using the sub-beacon's directional antenna, and this information is sent back to the center unit through the main beacon. It relates to a dual beacon system. A preferred embodiment of the present invention includes a safety belt and a smart safety belt configured to include a warning unit connected to the safety ring by wireless communication to give a notification to the operator; a sub beacon that detects the position information of the operator and activates the warning unit within the corresponding radius; A communication module capable of receiving a signal is configured, the main beacon is configured to transmit and receive bidirectional communication with the warning unit of the smart safety belt, and activates the warning unit within the corresponding radius; and a center unit connected to the main beacon through wireless communication and receiving information on the smart safety belt activated within a corresponding radius of the main beacon.
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