BiAlO3　is　a　perovskite　ferroelectric　with　a　high　Curie　temperature　above　520A　degrees　C.　However,　it　is　difficult　to　prepare　pure　perovskite　phase　by　the　conventional　method.　In　this　experiment,　BaTiO3　has　been　selected　as　host　to　incorporate　BiAlO3,　and　the　nominal　binary　system　of　(1-x)BaTiO3-xBiAlO(3)　has　been　investigated　with　regard　to　its　Curie　temperature　(T　(c))　and　dielectric　relax　behaviors.　It　was　found　that　the　pure　perovskite　phase　can　be　retained　below　x　=　0.08.　However,　the　value　of　T　(c)　in　the　system　doesn＇t　follow　the　normal　Vegard＇s　law,　on　the　contrary,　shows　the　decreasing　trend　with　the　increase　of　x.　According　to　the　compared　experiments　about　Bi3+　and　Al3+　doping　in　BaTiO3,　it　can　be　safely　concluded　that　the　combined　substitution　of　Bi3+　and　Al3+　played　the　dominant　role　to　decrease　the　T　(c)　and　increase　the　relaxor　behavior　in　(1-x)BaTiO3-xBiAlO(3)　system.