Digital human body heat energy detector is one kind device to detect body heat energy radiation. Seven rabbits and three dogs were used for animal experiment to study the relationship between body energy rediation and blood flow with HED. It was found that, by comparing the change of the differences of heat energy radiation of symmetric parts of the body detected with HED, it is possible to detect the decrease and increase of the blood flow in kindney and femoral arteries sensitively within two minutes afte...