Although　there　are　many　management　systems,　Cloud　management　still　faces　with　great　challenges,　due　to　the　diversity　of　Cloud　resources　and　ever-changing　management　requirements.　Integration　and　adaptation　become　important　for　constructing　a　cloud　management　system,　because　a　redevelopment　solution　based　on　existing　systems　is　usually　more　practicable　than　developing　the　management　system　from　scratch.　However,　the　workload　of　redevelopment　is　also　very　high.　As　the　runtime　model　is　causally　connected　with　the　corresponding　running　system　automatically,　constructing　an　integrated　Cloud　management　system　based　on　runtime　models　can　benefit　from　the　model-specific　natures　to　reduce　the　development　workload.　Therefore,　in　this　paper,　we　present　a　runtime　model　based　approach　to　constructing　cloud　management　system.　First,　we　construct　the　runtime　model　of　each　Cloud　resource　based　on　its　own　management　interfaces.　Second,　we　construct　a　composite　model　reflecting　integration　management　requirements　through　merging　the　distributed　runtime　models.　Third,　we　make　Cloud　management　meet　the　adaptation　requirements　through　model　transformation　from　the　composite　model　to　the　customized　models　specific　to　different　administrators.　Such　architecture-level　integrated　management　brings　many　advantages　related　to　the　interoperability,　reusability　and　simplicity.　The　experiment　on　a　real-world　cloud　demonstrates　the　feasibility,　effectiveness　and　benefits　of　the　new　approach　to　integrated　management　of　Cloud　resources.　Categories　and　Subject　Descriptors　D.2.11　[Software　Engineering]:　Software　Architectures　General　Terms　Management.