We　investigate　the　blowup　solutions　to　the　Klein-Gordon-Schrodinger　(KGS)　system　with　power　nonlinearity　in　spatial　dimensions　RN　(N　＞=　2).　Relying　on　a　Lyapunov　functional,　we　establish　a　perturbed　virial-type　identity　and　prove　the　existence　of　blowup　solutions　for　the　system　with　a　negative　energy　and　small　mass.　Moreover,　we　obtain　a　new　finite-time　blowup　result　of　solutions　to　KGS　system　in　the　energy　space　by　constructing　a　differential　inequality.