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Change related to climate in Macao was studied on the basis of daily temperature observations over the period1901-2007.The result shows that annual mean surface air temperature in Macao as a whole rose with a warming rate of about 0.066℃ per 10 years in the recent 107 years.The most evident warming occurred in spring and winter.The interdecadal variations of the seasonal mean temperature in summer and winter appeared as a series of waves with a time scale of about 30 years and 60 years,respectively.The annual mean minimum temperature increased about twice as fast as the annual mean maximum temperature,resulting in a broad decline in the annual mean diurnal range.The interdecadal variations of annual mean maximum temperature are obviously different from those of annual mean minimum temperature.It appears that the increase in the annual mean maximum temperature in the recent 20 years may be part of slow climate fluctuations with a periodicity of about 60 years,whereas that in the annual mean minimum temperature appears to be the continuation of a long-term warming trend.