Pure silver catalyst and silver catalysts doped with transition metals were prepared by reduction of the silver salt. Oxygen chemisorption and electrochemical measurement（to measure oxygen reduction current）methods were employed to investigate the activity of catalysts, and two experimental results showed a good agreement relatively. In the aspect of catalytic activity, doped Ag catalysts were superior to pure silver catalyst. It was thought that the improvement of electrode preformance on doped Ag catalysts was mainly due to the reaction region increase by adding dopant. Among the Ag catalysts, Ag-Fe, Ag-Pt and Ag-Bi-Ni-Ti showed better electrode preformance than the others. The current density of Ag catalyst was about 63 mA/cm², but that of Ag-Fe was about 160 mA/cm².