Due　to　the　diversity　of　resources　and　different　management　requirements,　cloud　management　is　faced　with　great　challenges　in　complexity　and　difficulty.　For　constructing　a　management　system　to　satisfy　a　specific　management　requirement,　redeveloping　a　solution　based　on　existing　management　system　is　usually　more　practicable　than　developing　the　system　from　scratch.　However,　the　difficulty　and　workload　of　redevelopment　are　also　very　high.　In　this　paper,　a　runtime　model　based　approach　is　presented　to　managing　diverse　cloud　resources.　First,　the　runtime　model　is　constructed　for　each　type　of　cloud　resources　based　on　their　management　interfaces.　Second,　the　composite　runtime　model　is　build　for　all　managed　resources　through　merging　their　runtime　models.　Third,　cloud　management　is　setup　to　meet　specific　requirements　through　model　transformation　from　the　composite　model　to　the　customized　models.　Additionally,　based　on　OpenStack　and　Hyperic,　a　runtime　model　based　management　system　is　implemented　to　manage　the　hardware　and　software　resources　of　virtual　machines　with　the　proposed　approach.　The　results　prove　that　new　approach　is　feasible　and　effective.　©　2014　ISCAS.