在应用上，公共卫生实际包括三个主要领域，即健康改善、健康维护以及卫生服务能力改善。健康改善依赖于社会经济、专业能力、健康促进以及其他影响健康的决定因素；健康维护涉及传染病控制、环境与职业健康保护以及化学、射线防护等；卫生服务能力改善依赖于卫生系统的服务质量和效率以及卫生经济学。公共卫生的核心基础为流行病学、卫生统计学、临床实验及法律和伦理。文章评述公共卫生学科内涵以及重点领域在我国的演变。

In practice, public health includes three domains, that is, health improvement, health protection and health service. Health improvement depends on social economy, local government roots of the profession, health promotion and all determinants of health. Health protection deals mainly with communicable disease control, environment and occupational health protection, and chemicals and rays protection. Health service capacity improvement depends on the quality and efficiency of health system and health economics. The core skills and knowledge of public health are epidemiology, biostatistics, clinical trials, low and ethics. This paper deals with the commentary of concept and domains of public health in China through system literature review.