Electron-energy-loss　spectroscopy　(EELS)　has　been　used　to　study　the　element　contents　of　the　grains　in　the　bulk　polycrystalline　La1-xAgxMnO3　ceramic　samples　prepared　by　conventional　solid-state　reaction　process　in　air.　Only　characterized　core-shell　ionization-edge　EELS　spectra　of　La,　Mn,　and　0　were　observed　while　no　spectrum　of　Ag　was　detected,　indicating　that　Ag　is　not　doped　into　manganite　perovskites.　However,　it　was　found　by　electron　spin　resonance　investigation　that　the　ferromagnetic　phase　is　enhanced　with　the　increase　of　the　nominal　Ag　composition　and　reaches　its　maximum　around　x=0.35　in　the　ferromagnetic　and　paramagnetic　coexistence　of　La1-xAgxMnO3　systems.　The　unique　role　of　Ag　was　ascribed　to　the　introduction　of　oxygen　into　manganite　perovskites,　leading　to　further　oxidation　of　manganite　perovskite　grains.