The　epitaxial　La0.7Sr0.3MnO3/BaTiO3　bilayer　heterostructures　were　deposited　on　LaAlO3　(001)　and　(110)　substrates　by　pulsed　laser　deposition.　The　inherent　ferromagnetic,　ferroelectric　properties　and　strong　magnetoelectric　(ME)　effect　at　room　temperature　were　approved,　which　correlated　to　the　preferred　orientation　of　the　films.　Both　heterostructures　showed　similar　frequency-dependent　ME　behavior　in　0.1　kHz-100　kHz,　the　ME　voltage　coefficients　were　around　140　mV/cm　Oe　and　104.8　mV/cm　Oe　at　1　kHz　for　(001)　and　(110)　oriented　bilayers,　respectively.　This　was　at　least　one　order　of　magnitude　higher　than　previously　reported　results　of　the　related　heterostructures,　which　is　mainly　ascribed　to　the　lower　dielectric　constant　of　BTO　film.　(C)　2011　Elsevier　Ltd.　All　rights　reserved.