Disclosed is an LNG bunkering monitoring system capable of detecting a risk in advance during LNG bunkering, identifying the cause of the risk, and preparing a countermeasure. The LNG bunkering monitoring system includes an environmental sensor module capable of detecting the temperature, humidity, wind direction, wind speed, image, and location of the environment in which workers are input during the LNG bunkering operation, such as a ship receiving LNG fuel or an LNG storage tank. , LNG detection sensor module installed in the vessel receiving the LNG fuel, LNG storage tank, LNG supply tank, and LNG pipe facility to detect flow rate, pressure, and electrical resistance, and connected to the environmental sensor module and the LNG detection sensor module The environmental sensor module and the LNG detection sensor module detects the surrounding environment data of the worker and the LNG detection data, and simultaneously saves and compares the previously stored reference data with an environmental sensor that is less than or exceeds the set reference value. The data server unit for calculating the position of the module or the LNG detection sensor module, and the location of the environmental sensor module or the LNG detection sensor module that is less than or exceeds the set reference value set from the data server unit is transmitted, and is set. It may include a control unit that stops the operation of the LNG pipe facility in which the environmental sensor module or the LNG detection sensor module is located below the reference value or exceeds the set reference value, and generates a danger signal.
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