The vapor phase liquid nitrogen storage tank uses liquid nitrogen as the refrigerant to meet low-carbon refrigeration and environmental protection requirements. It has a fully automatic operation monitoring system to ensure sample safety. Using high vacuum multi-layer insulation technology, electronic temperature control technology and liquid nitrogen dispersion technology, the intelligent cooling and constant temperature process is uniform and stable, and the liquid nitrogen evaporation loss rate is extremely low. This product can provide two modes of liquid-phase cryopreservation and gas-phase cryopreservation to meet the various needs of users in cryopreservation.