The solid oxide fuel cell–micro gas turbine hybrid system with CO2 capture seems to be a prospective system with high efficiency and low emissions. Three hybrid systems with/without CO2 capture are designed and simulated based on the IPSEPro simulation platform. The performance on the design point shows that case 2 is a better one, whose system efficiency is 59% and CO2 capture rate is 99%; thus, case 2 is suitable to build a quasi-zero carbon emission plant. However, case 3 is more suitable to rebuild an existing plant. Then the off-design point performance and the effect of the capture rate on the system performance of cases 2 and 3 are investigated. The suggested capture rate for cases 2 and 3 is given based on the result, taking both economic factors and carbon emissions into consideration.