Cloud　Computing　is　evolving　as　a　key　computing　paradigm　for　sharing　resources.　One　type　of　Cloud,　which　provides　platform　resources　including　all　the　elements　of　application　runtime　environment,　is　regarded　as　PaaS　Cloud.　The　management　of　PaaS　Cloud　is　a　complex　task,　up　to　the　point,　where　manual　operation　is　hard　to　be　cost　effective.　As　the　application　runtime　environment　is　supported　by　a　set　of　dynamically　composed,　distributed　elements.　What　is　more,　in　order　to　achieve　a　management　target,　multiple　operations　have　to　be　applied　over　the　distributed　and　heterogeneous　elements　of　PaaS　Cloud.　To　improve　the　management　of　PaaS　Cloud,　this　paper　proposes　to　support　the　configuration　and　deployment　of　application　runtime　environment　in　PaaS　Cloud　with　an　autonomous　engine.　The　automation　is　enabled　by　the　definition　of　a　domain-specific　information　model,　which　captures　all　the　related　information　with　the　same　abstractions,　describing　the　application　runtime　environment,　PaaS　Cloud　infrastructure　and　management　targets.　On　top　of　that,　a　technique　based　on　Satisfiability　is　described,　which　automatically　analyses　the　state　of　the　managed　objects　and　plans　required　operations　for　maintaining　it.　The　result　from　a　case　study　is　provided　to　validate　the　feasibility　of　this　approach.