The　sequencing　batch　reactor　(SBR)　process　has　shown　great　success　in　the　treatment　of　industrial　wastewater　from　intermittent　discharge　factories　and　for　the　treatment　of　domestic　wastewater　from　medium　or　small　towns.　As　automation　technology　has　developed,　many　studies　have　been　conducted　to　determine　the　optimal　conditions　for　the　SBR　process.　This　review　outlines　the　progress　and　application　of　control　strategies　that　have　been　developed　for　the　SBR　process　and　provides　a　summary　and　comparison　of　the　advantages　and　disadvantages　of　various　control　strategies,　especially　fixed-time　control　strategies　and　various　real-time　control　strategies.　Moreover,　an　analysis　and　discussion　of　novel　optimal　control　methods　for　biologic　nutrient　removal　are　provided.　Although　previous　studies　in　this　field　have　greatly　enriched　our　understanding　of　SBR　systems,　it　is　clear　that　many　unsolved　problems　remain.　Therefore,　a　summary　of　unanswered　questions　regarding　control　strategies　for　the　SBR　process　is　provided　and　future　research　directions　are　suggested.