As a part of reconstruction of the equipment for electrolytic refining in Mining and Metallurgy Institute Bor, a new control system was introduced. The system is based on microcontroller and PC. This system provides automatic control and timely transfer of informations about the status of all important process parameters to process operators. Supervision of the process can be performed locally, or from a remote location through a local area network or over the Internet. The control system provides automatic monitoring and recording of cell voltages, electrolyte temperatures, and automatic control of the heaters. In case of exceeding the given boundary conditions system generates alarm messages. Now, after application of the control sistem, the reliability of electrolytic refining process is improved and insight into the status of process parameters is better.