In this study, the material and energy balances were clarified for an energy-saving small-scale methane fermentation facility. As a result, the facility was operating with a long residence time at a design acceptance rate of about 27%. Furthermore, the organic matter decomposition rate decreased due to the decrease in the amount received and the change in the properties of the food waste. In the energy balance analysis, the amount of methane fermentation received was about 0.8 tons per day, and the self-sufficiency rate of electricity was about 113%, indicating that the methane fermentation facility is energy independent.