Metal　halide　perovskites　(MHPs)　have　been　widely　investigated　for　various　photocatalytic　applications.　However,　the　dual-functional　reaction　system　integrated　selective　organic　oxidation　with　H-2　production　over　MHPs　is　rarely　reported.　Here,　we　demonstrate　for　the　first　time　the　selective　oxidation　of　aromatic　alcohols　to　aldehydes　integrated　with　hydrogen　(H-2)　evolution　over　Pt-decorated　CsPbBr3.　Especially,　the　functionalization　of　CsPbBr3　with　graphene　oxide　(GO)　further　improves　the　photoactivity　of　the　perovskite　catalyst.　The　optimal　amount　of　CsPbBr3/GO-Pt　exhibits　an　H-2　evolution　rate　of　1,060　mu　mol　g(-1)　h(-1)　along　with　high　selectivity　(＞99%)　for　benzyl　aldehyde　generation　(1,050　mu　mol　g(-1)　h(-1))　under　visible　light　(lambda　＞　400　nm),　which　is　about　five　times　higher　than　the　CsPbBr3-Pt　sample.　The　enhanced　activity　has　been　ascribed　to　two　effects　induced　by　the　introduction　of　GO:　1)　GO　displays　a　structure-directing　role,　decreasing　the　particle　size　of　CsPbBr3　and　2)　GO　and　Pt　act　as　electron　reservoirs,　extracting　the　photogenerated　electrons　and　prohibiting　the　recombination　of　the　electron-hole　pairs.　This　study　opens　new　avenues　to　utilize　metal　halide　perovskites　as　dual-functional　photocatalysts　to　perform　selective　organic　transformations　and　solar　fuel　production.