Blast furnace operation refers to the monitoring, judgment and control of blast furnace ironmaking process. The task of blast furnace operation is to maintain stable, smooth and efficient production, so as to achieve the purpose of high output, good quality, low consumption and long furnace life. The contents of blast furnace operation include: the formulation and control of basic operation system, the judgment and adjustment of furnace conditions, the diagnosis and treatment of abnormal furnace conditions, slag and iron tapping operation, slow air operation, air suspension and re air, blast furnace startup, blast furnace stuffy and blast furnace shutdown.