Rough ontology is a basic tool to handle imprecise information.Its form is a tree structured by the rough concept and the rough relation.The specific form of rough ontology presents the multiplicity because the different domain experts participate in constructing it,but the structure of rough concept lattice also composed of the rough concept and the rough relation is unique.The rough ontology construction can use similarity of the composition and the structure of lattice and tree.Construct a rough concept ...