In　order　to　represent　fuzzy　ontology,　this　paper　extends　existing　ontology　Web　language　(OWL),　which　can　only　represent　certain　and　complete　concepts　and　knowledge　at　present,　by　encoding　fuzzy　constructors,　axioms　constraints　and　maps　semantics　of　new　vocabularies　to　fuzzy　description　logic.　Moreover,　the　paper　presents　mapping　rules　from　OWL　to　new　vocabularies　named　fuzzy　ontology　Web　language　(FOWL).　At　last,　the　paper　gives　an　example　of　image　retrieval　to　show　representation　and　reasons　of　fuzzy　ontology　in　FOWL　form.