Abstract: Fuzzy controllers as shown in practice have many advantages over conventionalDDC or PID controllers,but it is still limited for simple Fuzzy controller to furtherimprove its control quality with its quantization and proportion factors constant.Inthis paper a method of parameters self-adjusting is proposed to meet process reqirementfor parameters in different response time period,thus the controller becomes more intel-ligent and has an optimized response.And the advances of conventional PID control-ler are combined into Fuzzy controller.Therefore we develope a new kind of control-ler,namely,parameters self-adjusting fuzzy-PI controller.Also results of simulationand application to temperature control of an oil-fueled annealing furnace are shown hereto demonstrate its fine characteristics.