It is useful to save umbilical cord blood, which contains more hematopoietic stem cells, which are very precious to children, and the hematopoietic stem cells can be differentiated into cells of various parts through technology, which can cure many diseases, such as leukemia. Cord blood is the spare blood bank of the human body. The preservation of cord blood is complicated, and although it has many benefits, it also needs to be processed at a regular hospital and various agreements need to be signed in order to preserve the cord blood perfectly. Also, cord blood can be used for hematopoietic stem cell transplantation to treat various hematologic or immune system diseases, and it can also be used to alleviate genetic metabolic diseases or other problems, as well as to rebuild the human hematopoietic and immune systems, which can be selected according to the actual situation.