While　building　the　large-scale　domain　ontology,　the　traditional　manually-based　construction　method　is　low　efficient　and　not　feasible.　In　order　to　construct　the　large　scale　domain-ontology　automatically;　therefore,　proposed　a　two　stage　method　for　large　scale　Chinese　domain-ontology　automatic　construction　by　merging　the　thesaurus　and　online　encyclopedia　together.　On　the　first　stage,　fuzzy　mapping　the　thesaurus　to　OWL　and　construct　the　domain　rough-ontology;　on　the　second　stage,　including　the　following　steps:　(i)　Concept　Mapping　and　Pruning,　(ii)　deciding　attribute　from　Chinese　encyclopedia　and　(iii)　rough-ontology　self-Adaptive　and　expansion.　Practice　has　proved　that　the　system　has　the　feasibility　and　robustness　on　achieving　the　large　scale　domain　ontology　automatic　and　rapid　construction.　©　2013　Springer-Verlag　Berlin　Heidelberg.