Abstract: The feasibility of several perovskite-type oxide materials used as the cathode for Molten Carbonate Fuel Cells (MCFC) was discussed by studying the stability of the materials in MCFC molten carbonate. Experimental results showed that SrFe_0.5Co_0.5O₃ has conspicuous mixed electric characteristic but the major limit is dissolution in the electrolyte of molten carbonate. La_0.8Sr_0.2MnO₃, La_0.8Sr_0.2Ce_0.1Mn_0.9O₃ and La_0.8Sr_0.2Ni_0.1 Mn_0.9O₃ were filtered by a lot of Li⁺ and dissolved a large amount of Sr²⁺ in molten carbonate, and thus these several materials could not be used as the cathode for MCFC. It was proved by experiment that the stability behavior of LaMnO₃ which had been lithium-loaded beforehand was outstanding in MCFC molten carbonate.