Perovskites　are　promising　candidates　for　use　in　catalytic　combustion　applications.　In　the　present　study,　La(1-x)Ag(x)MnO(3)　(x　=　0,　0.1,　0.2,　0.3,　0.4)　were　prepared　by　the　citrate　method　and　characterized　by　X-ray　diffraction　(XRD)　and　specific　surface　area　(SSA)　measurement.　The　activity　was　tested　in　a　fixed　bed　quartz　reactor　with　eras　hourly　space　velocity　(GHSV)　of　48000　h(-1).　Combustion　of　methane,　hydrogen,　CO　and　the　synthesis　gas　was　investigated.　The　results　showed　that　La(0.7)Ag(0.3)MnO(3)　achieved　the　highest　catalytic　activity　and　specific　surface　area　(SSA),　with　regard　to　other　catalysts　in　single　combustible　gas　combustion.　The　methane　conversion　temperatures　changed　slightly　in　the　hydrogen　addition　experiment　using　perovskite　catalysts.