The impact of the global change causes the influence of the water cycle, and it affects the water resource management. Therefore, we analyzed the rainfall on climate change in Taiwan. This research divided Taiwan into four parts, and then analyzed the variation of rainfall data. The results indicated that the amount of the yearly rainfall data was decreased from the north to the south parts in the west area, and furthermore it was decreased from the south to the north parts in the cast area. However, the amount of rainfall extremes events and the yearly non-rainy days appear to show an increasing trend in Taiwan.