Drought has profound influences on plant growth as well as ecosystem structure and function. Many studies have predicted that drought will be more frequent in the future due to global change. This will cause major change in ecosystem and possibly change the carbon budget from carbon sinks to carbon sources. Such changes may in turn aggravate global climate change. The rainfall pattern has been undergoing major changes in Taiwan. Both floods and droughts become more prominent and frequent. Because of the complicate interaction between topography and monsoons, the changes in rainfall patterns diverge considerably in different time and space. Although drought tends to change carbon budget in ecosystem, few studies have examined the impact of drought on vegetation growth in Taiwan. Therefore, this study aims to examine the effects of drought events on vegetation growth in different regions of Taiwan. Muti-years MODIS satellite data are used to calculate the normalized difference vegetation index (NDVI) after dry seasons as well as to evaluate drought-induced vegetation changes. The results show that during dry seasons the rainfalls were very diverse in different region of Taiwan. We also found several significant drought events occurring from 2001 to 2010. The estimated correlation between NDVI values and rainfall is 0.5 in Spearman Rank Correlation (moderate correlation). This research helps to understand the influences of drought events on ecosystem in Taiwan and also to evaluate the effects of drought under global change on vegetation growth in Taiwan.