A natural gas hydrate tank container loading system enabling self-powered power generation and boil-off gas treatment, which solves problems of natural gas hydrate transportation methods in the related art in that there is a limitation in connecting and operating an electric power line to a refrigerator for maintaining a phase equilibrium condition in natural gas hydrate tank containers during long-distance transportation of natural gas hydrate, the natural gas hydrate tank container loading system comprising: - a plurality of natural gas hydrate tank containers which is stacked in a vertical direction; and - a refrigerator which is installed at one side of each of the natural gas hydrate tank containers in order to maintain phase equilibrium of the natural gas hydrate stored in each of the natural gas hydrate tank containers; wherein the system further comprises: - an electric power supply unit which is installed at an upper portion of an uppermost container, among the plurality of the gas hydrate tank containers vertically stacked, in order to supply electric power for operating the respective refrigerators by generating electric power by using sunlight and boil-off gas generated from the natural gas hydrate tank containers; - a sensor unit which includes a plurality of sensors including temperature and pressure sensors for detecting a current state including an internal temperature or pressure in the respective natural gas hydrate tank containers; and - a control unit which controls operations of the refrigerator and the electric power supply unit and an overall operation of the loading system based on the state detected by the respective sensors of the sensor unit, wherein the electric power supply unit includes a photovoltaic array which generates electric power by using sunlight, an electric generator which is operated by boil-off gas generated from the respective natural gas hydrate tank containers, a fuel tank which stores fuel to be supplied to the electric generator, a compressor which mixes fuel supplied from the fuel tank with boil-off gas generated from the natural gas hydrate tank container and supplies the mixed fuel and boil-off gas to the electric generator, a battery (rechargeable battery cells) which stores electrical energy generated by the photovoltaic array and the electric generator, a fuel safety device which prevents fire and explosion caused by a reverse flow during combustion of the boil-off gas, and a housing which accommodates the electric generator, the fuel tank, the compressor, the battery, and the fuel safety device, and the electric power supply unit charges the battery by the electric generator operated by using the photovoltaic array and the boil-off gas, and operates the refrigerator and the compressor by using electrical energy with which the battery is charged, such that phase equilibrium in the respective natural gas hydrate tank container is always maintained without being supplied with separate electric power. - a plurality of natural gas hydrate tank containers which is stacked in a vertical direction; and - a refrigerator which is installed at one side of each of the natural gas hydrate tank containers in order to maintain phase equilibrium of the natural gas hydrate stored in each of the natural gas hydrate tank containers; - an electric power supply unit which is installed at an upper portion of an uppermost container, among the plurality of the gas hydrate tank containers vertically stacked, in order to supply electric power for operating the respective refrigerators by generating electric power by using sunlight and boil-off gas generated from the natural gas hydrate tank containers; - a sensor unit which includes a plurality of sensors including temperature and pressure sensors for detecting a current state including an internal temperature or pressure in the respective natural gas hydrate tank containers; and - a control unit which controls operations of the refrigerator and the electric power supply unit and an overall operation of the loading system based on the state detected by the respective sensors of the sensor unit,