With the votes for the candidates belonging to which party to do the point estimation using the electoral data since 2001, including legislative, magistrate, and presidential elections, the average number of votes is about 116,309 and the average percent is approximately 44.597% for the pan-green parties; and the average number of votes is about 143,745 and the average percent is approximately 55.283% for the pan-blue parties. Therefore, the pan-blue political landscape is 10.686% greater than the pan-green in Nantou County. When divided into two areas to do the point estimations that the pan-blue political landscape is 13.348% greater than the pan-green in the first constituency; and the pan-blue political landscape is 8.427% greater than the pan-green in the second constituency. With the votes for the candidates belonging to which party to do the interval estimation, the pan-blue political landscape is greater than the pan-green between 12.481% and 13.15% in Nantou County. When divided into two areas to do the interval estimations, the pan-blue political landscape is greater than the pan-green between 13.34% and 13.35% in the first constituency; the pan-blue political landscape is greater than the pan-green between 8.37% and 8.48% in the second constituency. The Moran's I is 0. 4758 and the Standardized Z (I) is 13.34, and they display there is a strong regional differences, and the political support is obviously tending to the dark green party according to the Lai Jingui, et al. But this paper shows that Nantou County is a pan-blue super region. However, the results of 2014 election shows that the pan-blue total vote number is 149,361 and the pan-blue vote percent is 50.96%; the pan-green total vote number is 143,719 and the pan-green vote percent is 49.03%; compared with other cities and counties, the political landscape in Nantou County had shifted 5% from the pan-blue to pan-green parties. They match each other in strength now.