Sustained global development with the environmental issues have been repeatedly discussed and attention, while the Taipei region is also under the influence of climate change. In the past, it is known that there are severe heat island effects in the urbanized area of Taipei, and the hydrological change is caused by temperature change. The city continues to develop, so for the suburbs to carry out comprehensive weather detection and early warning is a matter of urgency. In this study, we observed the influence of heat island effect on the temperature, Precipitable Water Vapor (PWV) and rainfall in the suburbs. According to the results, the study confirmed that the urban area and the urban area have a rising trend during the period from 2006 to 2014, which is about 0.7 degree higher than that in the suburbs. The temperature in the suburbs decreases by 1.1 degree, of the decline is greater than the urban areas. The average PWV increased about 6.7 mm, the cumulative rainfall also increased about 54.7 mm. The other two high-temperature areas are gathered in the development zone, and in the northern mountain area presents a low temperature, heat island effect occurs obviously. Moreover, the rainfall is largest in the mountainous areas of the southern region in summer. While the winter due to wind direction, the rainfall falls in the northeastern region of the windward side. The results show that there is a significant urban heat island effect in the Taipei region, and the overall increase in the amount of PWV increases with the global warming and more rain falls in the urban area. In the face of future urban areas with more flooded conditions due to climate change, we need to strengthen the attention and planning of hardware for disaster prevention and flood prevention in urban areas to avoid irreparable disasters and losses.