Problems　of　optimization　are　very　important　for　both　the　worlds　of　sciences　and　industry.　Owing　to　their　practicality　such　as　tiny　dimensions,　velocity,　lower　building　costs,　safety　operations,　DC　motor　has　been　used　as　a　key　aspect　of　industrial　applications.　However,　it　is　hard　to　acquire　the　correct　controlling　parameter　values.　The　most　common　control　is　the　PID　(Proportional-Integrated-Derivative)　controller　due　to　its　efficiency　and　simple　operation.　This　paper　provides　an　approach　of　determining　the　optimum　control　parameters　of　PID　for　the　Chopper　Fed　speed　motor　control　using　the　Ant　Colony　Optimization　(ACO).　The　efficiency　and　validity　of　the　design　method　based　on　ACO　are　shown　in　the　Simulation　outcomes.