The　present　investigation　is　concerned　with　the　experimental　detet　lination　of　the　influence　of　pressurized　submerged　combustion　technology　on　thermal　efficiency　and　pollutant　emissions.　Direct　photography　is　to　examine　the　global　features　of　the　flame　created　from　an　impinging　injector　faceplate　outside　the　device.　Gas　analyzer　is　used　to　examine　pollutant　emissions,　including　CO,　released　from　the　system　under　conditions　of　four　different　submergences　when　the　pressure　above　the　surface　liquid　is　3　bars.　Evidence　is　presented　that　pressurized　submerged　combustion　technology　as　advanced　designs　of　conventional　submerged　combustion　can　reduce　NOx　and　CO　emissions　definitely.　With　the　submergence　increases,　NOx　emission　is　around　12　PPM.　In　the　range　of　the　excess　air　coefficient　＜　1,　the　results　show　that　CO　emission　is　about　5.56　PPM.　NOx　emission　increases　from　9.18　to　20.16　PPM　as　the　excess　air　coefficient　varies　from　0.872　to　1.582,　while　CO　emission　reduces　to　zero.　Therefore,　it　is　the　excess　air　coefficient,　rather　than　the　submergence,　plays　a　key　role　in　controlling　the　pollutant　emissions.　The　evaporation　of　water　has　been　carried　out　in　this　apparatus　with　the　gross　thermal　efficiency　of　95.2　%.　The　upshots　of　all　these　are　that　the　whole　process　very　efficient　and　environmental　indeed.