A　series　of　powder　samples　Ba3Y1-x-y(PO4)(3):xTm(3+)-yDy(3+)　were　synthesized　by　a　standard　solid　state　reaction.　The　structure　of　the　compound　was　confirmed　by　XRD　technique.　The　concentration　quenching　of　Ba3Y1-x-y　(PO4)(3):xTm(3+)　was　investigated　in　detail.　The　photoluminescence　emission　and　decay　measurements　of　Ba3Y1-x-y　(PO4)(3):kTm(3+)-yDy(3+)　revealed　the　energy　transfer　from　Tm3+　to　Dy3+　ions　under　359　nm　excitation.　The　energy　transfer　mechanism　from　Tm3+　to　Dy3+　in　Ba3Y1-x-y(PO4)(3):xTm(3+)　-yDy(3+)　phosphors　was　confirmed.　The　emitting　colors　could　be　tuned　form　blue　to　white　and　then　to　yellow　through　adjusting　the　concentration　of　Tm3+/Dy3+　ions.　Under　353　nm　excitation,　the　corresponding　color　coordinates　of　the　Ba3Y0.93(PO4)(3):0.03Tm(3+)　-0.04Dy(3+)　phosphors　is　very　close　to　the　stand　white　color　chromaticity　coordinates　(x=0.33,　y=0.33).