Medical testing is the use of modern physical and chemical methods, means of medical diagnosis of a discipline, the main study of how to provide the basis for clinical diagnosis and treatment through laboratory technology, medical equipment. Through systematic study, we will understand how to identify the human blood type, to determine whether a person is anemic, liver function is normal and so on. The discipline requires the use of a variety of photoelectric instruments and chemical reagents to complete the experimental analysis, so favor science, requires a good foundation in biology and chemistry.