In　this　study,　a　novel　dual-mode　luminescence　phosphor　KBaLu(MoO4)(3):Tb3+,　Yb3+　has　been　synthesized　by　high-temperature　solid-state　reactions,　and　the　crystal　structures　have　been　determined　for　the　first　time.　Single-crystal　X-ray　diffraction　data　reveal　that　its　space　groups　are　C2/c.　The　crystalline　structure　is　constituted　by　K/BaO8　distorted　square　antiprisms,　distorted　LuO8　polyhedra　and　two　kinds　of　distorted　MoO4　tetrahedra,　which　form　chains　lying　along　the　c-axis.　Spectroscopic　properties　and　energy　transfer　mechanisms　are　investigated　by　detailed　analyses　of　emission　and　excitation　spectra　and　excited-state　lifetimes.　The　KBaLu(MoO4)(3):Tb3+,　Yb3+　phosphor　shows　dominant　green　emissions　in　the　visible　region,　which　are　due　to　D-5(4)　-＞　F-7(5)　transition　of　Tb3+　under　excitation　light　in　ultraviolet　region　as　well　as　a　980　nm　laser,　and　the　CIE　coordinates　are　close　to　the　Society　of　Motion　Picture　and　Television　Engineers　(SMPTE)　standard　values　for　primary　green　(0.310,　0.595).　With　the　increasing　temperature,　the　luminescence　of　KBaLu(MoO4)(3):Tb3+,　Yb3+　phosphor　decreases　almost　linearly　with　the　CIE　coordinate　variation　from　(0.326,　0.616)　to　(0.327,　0.530),　which　results　in　photoluminescence　color　variation　from　primary　green　to　yellowish-green.　The　present　results　demonstrate　the　successful　synthesis　of　a　dual-mode　luminescence　material　KBaLu(MoO4)(3):　Tb3+,　Yb3+　phosphor　with　both　up-and　down-conversion　luminescence　properties;　moreover,　it　can　be　used　as　a　potential　spectrum　converter　in　display　lighting　and　anti-counterfeiting.