The　mechanically　stable　ZnO　films　with　excellent　optical　properties　were　directly　grown　on　the　graphene　layers　without　any　additional　treatments　by　using　pulsed　laser　deposited　(PLD).　XRD,　Raman　spectrum　and　temperature-dependent　photoluminescence　(TDPL)　are　employed　to　study　the　structure　and　optical　properties　of　ZnO　films　grown　on　the　graphene　layers.　By　adopting　a　plane　wave　ultrasoft　pseudopotential　method　based　on　density　functional　theory,　the　adsorption　binding　energy　of　ZnO　molecules　deposited　on　graphene　surface　is　calculated.　It　is　suggested　that　formation　of　C-Zn　bond　rather　than　the　C-O　bond　during　initial　stages　of　adsorption.　What　are　more;　the　binding　energies　and　interfacial　adsorption　energy　were　calculated.　It　can　be　concluded　that　the　interface　structure　model　is　tend　to　be　graphene-Zn-O-Zn-O　in　ZnO　thin　films　grown　on　graphene.　The　ZnO-graphene　nano-film　is　the　promising　candidate　for　potential　application　in　flexible　optoelectronic　devices.　(C)　2014　Elsevier　B.V.　All　rights　reserved.