In order to exploit the potential of energy-saving of blast furnaces in SKS lead smelting systems (hereinafter referred to as SKS blast furnace )，the income and expense distribution of energy and exergy were calculated and analyzed by adopting the energy and exergy analysis approach.The results indicated that the thermal efficiency and the exergy efficiency of the SKS blast furnace is 47.55% and 38.88%, respectively.The efficiencies can be improved by reducing the loss of discharged gas，making use of the energy of cooling water, directly reducing the high lead slag with new techniques.and so on.The thermal efficiency and the exergy efficiency of the SKS blast furnace can reach 71.34% and 43.01%, respectively,by only utilizing the energy of cooling water.The total output of the exergy leaving the SKS blast furnace is much smaller than the total input, and the internal irreversible exergy loss accounts for 41.85% of the total input of exergy.The exergy income of the SKS blast furnace is 1.61 times of the total energy income，which illustrates that the balance of the energy and the exergy have little relevance.Exergy analysis further shows the essential of the consumption of material and energy in systems.Moreover, the exergy analysis is simpler than the energy analysis.