The aims of this study are investigation of consumption, intensity and efficiency of fossil fuels and electricity energy in Iran's agriculture sector and emission of GHG and air pollutants and their social (damage) costs. D ata used in this study were obtained from ministry of energy and central bank of Iron in 1997- 2007. Input energy of fossil fuel and electricity in agriculture increased from 265.1 to 411.2 PJ in this period. Results show that the efficiency of using of fuels and electricity has not increased and increasing of social costs of GHG and air pollutants emission has been more than added value of agriculture sector. So, it is necessary that by increasing of technology level and replacement of age-old and depreciated machineries and equipments, appropriate management and increasing efficiency of fuel and electricity energy in macro level will cause decreasing negative effects of energy consumption.