Combining　ontology　with　grid　technology　and　applying　them　into　the　structure　engineering　is　an　inevitable　trend　and　demand　for　engineers　and　researchers.　Concerned　with　the　semantic　conflicts　during　resource　integration　and　sharing,　an　ontology-based　framework　of　the　structure　engineering　grid　is　introduced,　a　method　for　designing　the　ontology　model　of　the　structure　engineering　grid　is　proposed,　which　consists　of　three　types　of　ontology　concept:　Data　types　of　Ontology,　Core　Ontology　and　Grid　service　Ontology,　and　the　particular　description　of　their　functions　and　relations　are　given.　The　framework　and　the　model　are　flexible　and　suitable　for　structural　experimental　resource　integrating　and　searching.