The aim of this study was conducted to essay energy use efficiency in the maize production systems in Kermanshah province of Iran in summer 2010. For this study data was collected using questionnaires and face to face interview with 72 farmers. Results showed that the average application of N and P were 300 and 250 Kg/ha, respectively. Total inputs energy in maize production systems was 26917.47 MJ/ha. Energy efficiency (output-input ratio), energy productivity, net energy, water productivity and water-energy productivity together was 3.5 and 0.2 Kg/Mj, 67582.53 Mj/ha, 1.2 Kg/m^3 and 0.047 g (m^(-3)/Mj), respectively. Total energy input reduces 6331.66 Mj/ha by optimization of energy consumption pattern. It was concluded that extension activities are needed to improve the efficiency of energy consumption in maize production.