Abstract: Addressing the fact that waste heat from exhausted gas of industrial furnaces of the steel tube sector is not fully recovered,as a substitute for the conventional air heat exchanger,a new system called"system for utilizing exhausted gas from industrial furnace"has been developed,featuring using water to replace air,the conventional heat exchanging medium to produce steam for production purpose.The said system can not only meet the need for steel tube production,but also bring about better energy saving,higher benefitability and less environmental pollution.