Carbon dioxide reforming with methane is industrially an attractive reaction, it yields syngas with a H₂/CO ratio suitable for Fisher-Tropsch synthesis. The conversion of CO₂ and CH₄ to syngas can ameliorate the emission of greenhouse gases. However, this reaction spends much energy and raises coke formation. To improve these problems, electrocatalytic reforming of CO₂ with CH₄ was studied in a solid oxide fuel cell (SOFC) system which generates syngas and electrical power. The anode catalysts of peroskite and (Ni, Mg)O types were prepared by malic acid methods and characterized by N₂ physisorption and XRD. Catalytic activity and electrochemical properties were measured by GC and Potentiostat-Galvanostat. It was found that Ni_0.9Mg_0.1O catalyst showed higher conversion than other catalysts under tested conditions. Peroskite type and (Ni, Mg)O had similar current-voltage performance.