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La0.8Sr0.2MnO3-δ was synthesized by the Pechini's method.The XRD pattern and TEM indicate the formation of the perovskite without the presence of secondary phases.It was found that La0.8Sr0.2MnO3-δ sample prepared at 1000 ~C in air atmospheres,contains about 13.11% of the manganese as Mn4+ and 86.89% of the manganese as Mn3+.The electric measurements were carried out for La0.8Sr0.2MnO3-δ nanoceramics by using impedance spectroscopy methods and found to be 0.1 S/cm at 250 ℃ similar to the typical value of La0.8Sr0.2MnO3-δ materials.Its dependence on reciprocal temperature shows quite complicated mechanism of conduction.