Low-temperature storage system

A low-temperature storage system comprising:

• a low-temperature storage chamber storing a storage object at a low temperature;
• and a loading/unloading mechanism for loading and unloading the storage object into and out of the low-temperature storage chamber,
• the loading/unloading mechanism including an entry/exit preparation chamber attached to the low-temperature storage chamber and divided from an external environment and the low-temperature storage chamber,
• the entry/exit preparation chamber including a first anteroom having an interior space controlled to maintain a lower dew point D1 than that of the external environment, and a second anteroom disposed between the first anteroom and the low-temperature storage chamber and having an interior space controlled to maintain a dew point D2 that is between the dew point D1 in the first anteroom and a dew point D0 in the low-temperature storage chamber,
• the system further comprising a first gas supply line that supplies dry purge air having the dew point D1 to the first anteroom, a second gas supply line that supplies dry air having the dew point D1 to the first anteroom, a third gas supply line that supplies dry air having the dew point D2 to the second anteroom, and a single dry air generator for the first to third gas supply lines.