关键词: 粒空间, 直观粒, 抽象粒, 描述

Abstract: Rough set，quotient space and concept lattice are generally regarded as important researches on granular computing because they all concern the concept of granules.In order to make a uniform description for the granules which come from the different areas，logical formulas based on a universal set are constructed，so that granular space corresponding to the universal set is introduced，and abstract granules are defined within the space.By making analyses，it is proved that the granules involved in rough set，quotient space and concept lattice can be described by abstract granules.Thus，the granules obtained by means of different ways achieve the unification，which will provide a way for formulization on granular computing.

Key words: granular space, intuitive granule, abstract granule, description