This study focuses on the application of thermoeconomic analysis for the steam energy power plants of sugar factories. Konya Cumra Sugar Factory was considered as a sample sugar factory for which the thermoeconomic analysis was applied. The equality method (balance of the exergetic-costing method) was applied for thermoeconomic calculations. Exergy calculations of the steam energy power plant are considered to produce some scenarios compared to the current situation. The aim of this study is to increase the profit ratio of the sugar factory by achieving the most efficient usage of energy that is intensively used and produced within the factory. With this study we aimed to decrease the cost of exergy by increasing the present power of the steam energy power plant. In this study, some scenarios were considered with different powers compared to the present steam energy power plant of the factory. When 14 [MW] was selected for the steam energy power plant, we observed that the cost of the exergy decreased to 1.370 x10 boolean AND-5 [(sic)/kJ] according to the present of the steam energy power plant.