Abstract: Why and how the operations of ferrous metallurgical system should be optimized were studied based on the analyses of the current situation and the tendency of hot metal pretreatment technology in China4 The methods of system optimization were summarized and the application to ‘Blast Furnace-Hot Metal Pretreatment-Basic Oxygen Furnace ‘system and’ Raw Materials-Blast Furnace-Hot Metal Pretreatment-Basic Oxygen Furnace’ system optimized by means of dynamic programming were introduced.