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The effects of two catalyst fabrication techniques, impregnation method and colloidalmethod, on the performance of the oxygen electrode are studied and the difference in the catalyticactivity of the two kinds of catalysts towards oxygen reduction are also analyzed with the aid ofTEM and XRD. Based on the results and analysis, the following conclusions are obtained :thecatalyst fabricatin technique exerts an effect on the performance of the oxygen electrode, com-paring the performance of the Pt/C catalyst prepared by impregnation method with that of thePt/C catalyst prepared by colloidal method, the latter shows a higher catalytic activity towardsoxygen reduction; Pt/C electrocatalyst has small particle size and large fraction of Pt(111) crystalsurface.