Abstract: Based on the Aspen\|plus soft, SOFC stack model is established. The SOFC hybrid power system without CO₂ capture is designed. Then, the zero CO₂ emission SOFC hybrid power system is proposed. The performances of these two systems are compared and analyzed. With the mode of pure oxygen combustion, the outlet gas of zero CO₂ emission SOFC hybrid power system is composed of only CO₂ and steam, so it is easy to get CO₂ with higher concentration by means of condensation. Compared with the conventional power system with CO₂ capture, the energy consumption of CO₂ capture in the new system decreases a lot. This paper also analyzes the effects of the main parameters on the performance of the hybrid power system. Above research achievements will provide the useful guide for further study on zero CO₂ emission SOFC hybrid power system.