Contributors of air pollution one of them is the result of industrial process emissions. Many regulations are issued by the government to control the emission of these emissions. To meet these rules required a technology that can deal with these pollution problems. One such technology is the Electrostatic Precipitator. This method uses an electric field to ionize the dust particles so that the dust particles can be attached to the collecting plate electrodes. By using this ESP the amount of dust particulate that exits through the factory stack / chimney can be lowered to 64%. In its use, the control of the Electrostatic Precipitator uses the PIACS DC unit. PIACS DC is a control unit present in ESP that serves to control parameters on ESP which in its operation ESP has been integrated in the purchase package from the manufacturer. In this study discusses the analysis of optimization of electrostatic precipitator (ESP) based on current / voltage setting and material input charge. Based on this research data the researcher found that; of the material input charge, about 3-4% of the input material in RK-3 will be the output waste and while about 3.5-7.1% of the input material in RK-4 will be the output waste. When the charge input material setting is increased, efficiency will decrease if not matched with the appropriate current setting. For the current setting the higher the current setting then the amount of dust captured by ESP will become more and the efficiency will increase.