Wastewater　treatment　plants　that　are　recognized　as　one　of　the　main　sources　of　greenhouse　gas　(GHG)　are　undergoing　an　innovative　transformation　from　＂standard　emission＂　to　sustainable　sewage　treatment.　Carbon　neutrality　operation　has　become　the　core　content　of　future　wastewater　treatment.　The　characteristic　of　traditional　activated　sludge　processes　is　the　transform　of　pollutants　and　energy.　The　traditional　wastewater　treatment　process　adopts　the　way　of　＂energy　dissipation＂　and　＂pollution　transfer＂,　which　consumes　lots　of　energy　and　emits　a　large　number　of　greenhouse　gases　such　as　CO2　and　N2O.　To　reduce　the　greenhouse　gas　emissions　from　wastewater　treatment　plants　effectively,　the　current　technical　measures　to　achieve　carbon　neutrality　operation　from　both　macro　and　micro　perspectives　were　analyzed　and　the　use　of　domestic　and　foreign　sewage　treatment　plants　to　increase　energy　sources　and　reduce　expenditures　were　introduced　in　this　paper.　The　successful　experiences　that　domestic　and　foreign　wastewater　treatment　plants　to　increase　energy　utilization　and　reduce　energy　consumption　were　introduced,　which　provided　a　significant　reference　for　reducing　the　carbon　emissions　of　wastewater　treatment　plants,　gradually　realizing　the　low-carbon　operation　of　wastewater　treatment　plants　and　steadily　approaching　the　ultimate　goal　of　＂carbon　neutrality＂.　©　2022,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.