A dual-porosity filmed agglomerate model for the porous cathode of the molten carbonate fuel has been investigated to predict the perovskite type cathode performance. The model predicts steady-state cell performance, given the above conditions that characterize the state of the perovskite electrode. Also, the effective surface area of electrode pore was obtained by mercury porosimeter. The results of the investigation are presented in the form of plots of overpotential vs. current density with varied the electrode material, gas composition and mechanism. The predicted polarization curves are compared with the empirical data from 1 cm² cell.