This　study　is　to　demonstrate　the　performance　of　a　new　technology　for　complete　nitrogen　removal　from　soybean　wastewater　with　high　nitrogen　concentrations.　Nitrification-denitrification　via　nitrite　was　performed　in　three　kinds　of　operating　condition,　i.e.　nitrification-denitrification　via　nitrite　under　traditional　SBR　process,　nitrification-denitrification　via　nitrite　by　alternating　oxic/anoxic　under　fixed-time　control　and　nitrification-denitrification　via　nitrite　by　alternating　oxic/anoxic　under　on-line　fuzzy　control.　The　best　one　is　nitrification-denitrification　via　nitrite　by　alternating　oxic/anoxic　under　on-line　fuzzy　control.　It　not　only　improves　both　nitrification　and　denitrification　rates　and　decreases　total　reaction　time,　but　also　saves　the　amount　of　added　carbon　source　and　alkalinity.　In　addition,　reaction　time　can　be　shortened　and　operation　cost　can　be　saved　by　using　real-time　fuzzy　control　aeration　and　mixing　time.　So　this　method　enhances　the　efficiency　and　the　stability　of　nitrogen　removal,　and　reduces　operating　costs　and　construction　investment　in　the　process　of　wastewater　treatment.