The intelligent liquid nitrogen storage dewar (BCT38A), as an ideal storage method to maintain activity, can store blood bags, biological samples, biological materials, vaccines, reagents, embryos, etc. for a long time in research institutes, laboratories, blood stations, hospitals, disease prevention and control centers, reproductive centers, etc. It can integrate GPS positioning system, voice prompts, screen flashing and other functions to locate the liquid nitrogen tank more quickly, especially when many tanks are placed centrally, which greatly reduces the time of tank searching and ensures accurate access to embryo samples. Equipped with a large integrated touch screen, multi-touch control, it realizes smoother operation.