近年來全球各地屢傳出氣溫異常的現象，本研究為探討台灣地區的氣溫變遷，遂選取中央氣象局氣候資料較長的測站之氣溫資料，以時間序列迴歸模型進行分析。分析結果顯示，近百年來(各站創站年-2000年)台灣地區年平均最高溫、年平均最低溫皆呈顯著上升的趨勢，年平均最低溫上升的幅度大於年平均最高溫上升的幅度，其年日較差呈顯著減小的趨勢。此外，年絕對最高溫與年絕對最低溫均呈顯著上升的趨勢，酷熱天氣(日最高溫>30度)的時間長度呈顯著增加的趨勢，寒冷天氣(日最低溫<10度)的時間長度呈顯著減少的趨勢。進一步分析，還發現近40年來(1958-2000)平均最低溫、年絕對最低溫、寒冷天數之趨勢的變化幅度增加，而年平均最高溫、年絕對最高溫、酷熱天數之趨勢的變化幅度減緩，推測這可能是受都市化的影響所致。

To investigate temperature changes in Taiwan, the time series regression model was used to analyze the temperature data covering the period from 1897 to 2000. Results indicated that the diurnal temperature range (DTR) and the number of cold days (NCD) (<10度) have decreased while mean maximum temperatures (T max), mean minimum temperatures (T min), absolute maximum temperatures, absolute minimum temperatures and the number of hot days (NHD) (>30度) have increased significantly in Taiwan. T min have increased more than T max, although both have increased. The rate of increase of T min and absolute minimum temperatures, and the rate of decrease of the NCD since 1958 have been larger than those have been since 1897. The results suggest that urban effects may have positive effect, increasing T min and absolute minimum temperatures, and negative effect, increasing T max and the NHD during the past40 years.