本研究主旨為探討YouBike公共自行車在實施後減少環境汙染、能源消耗的實質效果為何，為此，本研究以問卷調查方式取得YouBike替代其它運具之比率，同時蒐集各種運具油耗計算，YouBike替代之運具所造成的油耗減少亦為節能量效果，將樣本對應YouBike一個月實際租借趟次，求得一個月大安區、信義區、中正區及中山區四個行政區的節能量為6,807.67公升，CO2 減量為16,455.48公斤；可概估臺北市一年的節能量為107,327.47公升，CO2 減量為259,431.69公斤，經研究結果得知YouBike的啟用具有一定的節能減碳效果。除了環保及接駁使用，民眾大部分認為YouBike為觀光休閒、運動的好選擇，不論租用目的為何，在YouBike主要帶來的節能減碳效益外，額外增加北市民眾運動的機會，本研究計算研究區的騎乘者平均每趟消耗熱量45大卡。
;In recent years, the rise of environmental awareness that the government encourage people on energy saving and carbon reduction. The Government is actively build better public transportation systems, the Taipei City of Department of Transportation in response to international trends to build green transportation "YouBike" as the short distance riding.
This study is to explore that implement the public bicycle sharing systems of YouBike could reduce environmental pollution and energy consumption.For this purpose, the study use questionnaires survey to get the ratios of substitution effect of YouBike on other transportation. Collecting all kinds of transportation is used to calculate fuel consumption, and substitution effect of YouBike from other transportation cause the fuel decrease as effectiveness of energy saving. The data corresponding YouBike actual rent times in one month to get Da’an District, Xinyi District, Zhongzheng District and Zhongshan District. The four districts’ effectiveness of energy saving is 6,807.67 liter and CO2 can be reduced by 16,455.48 kg. It can be estimated effectiveness of energy saving is 107,327.47 liters, CO2 reduction is 259,431.69 kg in Taipei city. The study results that YouBike have enabled effect in energy saving and carbon reduction. In addition to environmental protection and feeder conveyance to use, YouBike is tourism, leisure and healthiest forms of exercise. No matter what purpose is, the main efficiency make energy saving and carbon reduction. Besides, additional opportunities makes people increase their exercise time. In the four districts of study area, people consume 45 calories by one trip on average.