有鑑於二氧化碳排放量因工業建設大量增加，且全球暖化日趨嚴重，造成南北極冰山及高山冰河溶解，海平面上升，島嶼地區面臨土地淹水等問題。建築工業在台灣都市更新中占有重大總量，建築物新建過程中確實造成二氧化碳大量排放。為節能減碳保護地球，本研究探討本土鋼筋混凝土構造廠房與鋼構造廠房的成本及碳排差異。研究方法採用某廠房實際案例，此案例原設計為鋼骨鋼筋混凝土構造，本研究利用SAP2000推倒分析，建立接近模擬的鋼構造廠房及等效鋼筋混凝土廠房。再分析鋼構造廠房與等效鋼筋混凝土廠房的成本及碳排差異。研究結果發現模擬的鋼構造廠房二氧化碳排放並未大幅減量，且成本比鋼筋混凝土廠房增加。

Global warming has become serious due to carbon dioxide emission. Carbon dioxide emission has increased a great quantity due to industry construction. Sea level is increasing caused by icebergs on the South and North poles are melting. Island areas are confronted by floods. Building industries in Taiwan’s city renovation occupy a great amount. Carbon dioxide emission is very great caused by the erection of new buildings. In order to protect the Earth by energy saving and carbon reduction, differences of costs and carbon dioxide emissions between the local reinforced concrete and steel structures are studied in this paper. In this research method, a real factory building is adopted for example. The original design of the real factory building is steel reinforced concrete structure. The SAP 2000 computer program is used in this study. A simulate steel structure and an equivalent reinforced concrete structure are established according to the original factory building. Differences of costs and carbon dioxide emissions between the reinforced concrete and steel structures are analyzed. It is found that the carbon dioxide emission of the simulated steel structure does not reduce a great amount. The cost of the steel structure is great than that of the reinforced concrete structure.