粗糙集理论是一种新型的处理模糊和不确定知识的数学工具。本文给出了粗糙集理论的特点,阐述了几种粗糙集理论的扩展模型及其应用领域,最后讨论了粗糙集理论研究的前景。 Rough set theory is a new mathematical tool to deal with fuzzy and uncertain knowledge. This paper gives the characteristics of rough set theory, expounds several extended models of rough set theory and its application fields, and finally discusses the prospect of rough set theory research.