公共卫生学以人群为研究对象,以持久改善全人群健康为目标,运用现代医学知识和方法来研究环境对健康影响的规律,阐释环境因素与人群健康的相互关系,为公共卫生策略与措施的制定和效果评价提供依据,从而达到控制疾病和保障人群健康的目的。环境卫生学是研究自然环境和生活环境与人群健康的关系,揭示环境因素对人群健康影响的发生、发展规律,在充分利用有益环境因素和控制有害环境因素的基础上提出卫生要求和预防对策,增进人体健康,提高整体人群健康水平的 Public health takes the population as the research object and aims to improve the health of the entire population for a long time. It uses the modern medical knowledge and methods to study the law of the environmental health effects, explains the relationship between the environmental factors and the health of the population, and provides the public health strategies and measures Formulation and effectiveness evaluation to provide the basis, so as to achieve the purpose of disease control and population health protection. Environmental hygiene is the study of the relationship between the natural environment and the living environment and the health of the population, revealing the occurrence and development of environmental health effects on the population, putting forward the hygiene requirements and preventive measures based on the full use of the beneficial environmental factors and the control of harmful environmental factors, Improve human health, improve the overall health status of the crowd