Preventive medicine is based on "environment - the crowd - health" model to the crowd as the research object in order to prevent the main guiding ideology and use of modern medical knowledge and methods of environment on the health effects of the law of human disease occurred in the formulation of preventive measures to achieve health promotion, prevention of disability and mortality for the purpose of a science. Preventive medicine features include: work targeting individuals and groups, the focus is healthy and asymptomatic patients, countermeasures are more positive preventive effect, more people health benefits, research methods, focus more on micro-and macro-combination of research priorities the environment and the relationship between population medicine and clinical difference is that she took the crowd for the object, rather than confined to the individual as the target. Medical trend is one of the development of medicine from the individual to a group of medicine, many of today's real resolve medical problems, it is impossible to leave the group and group medical methods. The task of preventive medicine requires it must be able to face the future of medicine, from a strategic height to consider human diseases and health application of modern medicine and other disciplines of science and technology means to study human health and the relationship between environmental factors to develop disease control strategies and measures to achieve control of disease, to protect people's health and prolong human life purposes. With the medical model of development, the profession increasingly shown its importance in medical professional training in preventive medicine research and experimental work and the work has a certain level of health management of knowledge and foreign language health physician. Students to master the general theory of knowledge and skills in clinical medicine, based on the systematic grasp of the profession can be the basis of theory, basic knowledge and basic skills, able to use what they have learned the knowledge, skills, engaged in practical work and scientific training goal: This professional development with the basic theoretical knowledge of preventive medicine and health detection technology in health and disease prevention, environmental health or food health monitoring in preventive medicine institutions such as the work of senior medical professionals.