A generation method using a fuel cell generation system, comprising the steps of: supplying a fuel gas 14a to a fuel electrode 21 through fuel gas passages 14 at a low pressure, supplying an oxidizer gas 15a to an oxidizer electrode 22 at a low pressure, generating electricity by causing electrochemical reaction between the fuel gas 14a and the oxidizer gas 15a supplied, and controlling the fuel utilization ratio on the fuel electrode 21 so as to prevent the fuel gas passages 14 from being clogged with condensed water. Decrease in performance and local deterioration of materials are less likely to occur while component devices are not required of wide turn-down ratios.