Along　with　the　emergency　of　semantic　web　technology,　sharing　resource　at　the　semantic　level　becomes　a　hot　topic.　Ontology　can　accurately　describe　the　meanings　of　concepts　and　their　inner　relations　in　an　explicit　and　formalized　way,　so　resource　sharing　based　on　semantic　web　technology　get　extensive　attention.　The　ontology-based　integrated　model　and　the　heterogeneous　resources　integration　approach　are　studied　in　this　paper.　The　mapping　rules　from　XML　schema　and　relational　database　schema　to　ontology　are　defined,　and　the　semantic　mapping　approach　between　different　kinds　of　ontologies　is　given.　A　model　for　sharing　resources　in　P2P　systems　based　on　semantic　technologies　is　designed.　In　this　model,　ontology　is　used　as　the　unified　resource　description　form.　Peers　create　their　own　local　ontology,　and　a　global　ontology　as　global　view　is　created.　The　mapping　between　global　ontology　and　local　ontology　is　presented.