Modern medicine is basically developing continuously along the thinking method of reductionism. Reductionists believe that life phenomena and their dynamic processes can be reduced to physical and chemical molecular motion processes. Therefore, with the development of human society, science and technology are deepening in two directions, on the one hand to a more macroscopic universe, and on the other hand to a more microscopic world. The development of biomedicine has moved to the level of cells, genes, protein molecules, and even small chemical molecules. Therefore, the continuous development of medicine will inevitably lead to more and more detailed divisions. This is also the basic result of following reductionism.