全球氣候變遷，臺灣地區夏季的氣溫逐年升高，使得冷氣使用所需的耗能也越來越多，尖峰負載年年創新高。為防止大規模停電，造成嚴重的經濟損失，因此本研究探討臺灣地區氣溫與電力需求兩者之間的關係。
臺灣地區的電力需求呈現夏季多於冬季，平日多於假日的情形，溫度與電力負載呈現非線性關係，因此使用度日分析法使其氣溫與電力負載呈線性關係，以預測未來電力需求。
臺灣地區自1981年至2006年間的度日特徵顯示，取暖度日明顯受緯度影響，出現於11月至隔年4月；降溫度日受都市化影響，出現於5月至10月。整體上，臺灣地區因為緯度較低、氣候溫暖，高溫出現日數較低溫出現日數多，所以降溫需求遠大於取暖需求。
在未來變化預測上，使用CMIP3與CMIP5模式不同情境設定下的氣溫資料，做為推估未來溫度變化的依據。結果顯示，未來降溫度日將急速增加。假設電力負載只受溫度影響下，利用度日分析法所求得的迴歸方程預測未來可能的電力負載值，顯示電力負載於本世紀中葉及本世紀末皆呈現明顯增加的趨勢。

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