Abstract: Because of their operational condition, it is difficulty to use sublances to mesure and to conduct dynamic control in the small and medium sized converters. The method of dynamic control over the adaptive static model was presented. Based on the adaptive static final-point control model and the oxygenlance position-charging model, adjust the lance position and other control variables. And then a predication model is started to predict the operational targets and the time for tapping. The results of prac-tical testing have shown that the final-point control model hus good ability to adapt, and accu-racy of the predicted targeting carbon content and temperature by the prediction model reaches 68% and 63% respectively.