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In the second five environmental planning of Nanchong, the construction of ecological city is divided into the three start stage, advance promotion stage and full compliance stage, after 2007--2010 four-year period starting creation, Nanchong ecological civilization construction has achieved initial success, now in upgrade period. In this paper, AHP and entropy method is studied for the construction of ecological civilization and scientific evaluation of Nanchong City, Nanchong City enhance the status of the construction of ecological civilization in advance of quantification, inadequate grasp Nanchong construction of ecological civilization, in full compliance of the further deepening of Nanchong construction of ecological civilization provide public opinion, and reached the ecological economy, beautiful environment, ecology ecological social harmony Nanchong provide policy has important significance for the reference year 2020. Introduction Nanchong, Sichuan Basin, located in the northeast portion of the middle reaches of the Jialing River, between latitude 30 ° 35 '~ 31 ° 51', longitude 105 ° 27 '~ 106 ° 58' between; north-south span 165km, west span of 143km. Living in the west of Chengdu, east to Hubei, North cited Shaanxi, Chongqing Winsor special location. Nanchong has jurisdiction over three districts, five counties and one city, namely: ShunQingOu, Gaoping, Jialing, Nanbu County, Yingshan, Pengan, Sichuan, West County and Langzhong, as in 2014, all The total area of the territory 12 494km2, at the end of the total population of 759.02 million. Nanchong terrain with hills, 67% of the total area, the elevation is generally 256 to 889 m. Nanchong climate is humid subtropical monsoon climate, with an average annual rainfall of 1012mm, sunshine about 1100h, the maximum wind speed 13 m / s, average wind speed 1.6 m / sec. Nanchong underground, rich in non-metallic mineral resources, geological reserve of rock salt 1.8 trillion tons, is the largest natural salt mine in western Sichuan; has proven oil reserves of 7779 million tons, natural gas reserves of 9 billion cubic meters. Nanchong rich in water resources, Jialing River flows through the city, there are more than 100 tributaries, water area of 3.8% of the total area. The Method Used in this Study AHP Method. AHP method is a subjective method. It is essentially the basis for complex decision problems, influencing factors and the intrinsic relationship in-depth analysis on the use of quantitative information is less mathematical thinking process of decision-making, so as to multi-objective, multi-criteria or no structural characteristics the complex decision-making problem provides a simple method of weight right decision analysis. The first step, to establish a hierarchy diagram. The overall objective of the study, targets and impact indicators by their mutual relations descending hierarchical construct hierarchical structure. The overall objective of this study for the construction of ecological civilization evaluate Nanchong City, the highest level of this hierarchy diagram for that is always the target layer, followed by Target That criterion layer pollution control, environmental protection and social development of the three economic indicators at the bottom layer comprises 15 indicators of chemical oxygen 2nd International Conference on Education Technology, Management and Humanities Science (ETMHS 2016) © 2016. The authors Published by Atlantis Press 334 demand (COD) emissions intensity, sulfur dioxide (SO2) emissions intensity of urban sewage centralized treatment rate. The second step is to build pairwise comparison matrix. The three sub-goals rule layer pairwise comparison to determine their relative importance to the overall target layer. In this step, mainly through consulting experts and scholars in related fields, according to Saty 1-9 scale method, fill out evaluation forms index, the tables finally scaling the weighted average value of seeking to build pairwise comparison matrix . The matrix g = 3, , , when i = j when, . The third step is to calculate the guideline layer weight vectors and do consistency test. Guidelines for the use of Matlab software to calculate the pairwise comparison matrix A layer of maximum , then based on consistency index , random consistency index RI [1] and the consistency ratio , consistency judgment matrix A. If CR<0.1, the matrix through consistency test, it is the maximum value corresponding to the characteristic feature vectors normalized to give guidelines on the right layer of the three sub-goals overall target layer weight vector α. Entropy Method. Entropy Law is an objective weighting method. It is based on the degree of variation indicators calculated using information entropy weight of each index, resulting in a more objective index weight. If the information entropy index of the smaller, the greater the amount of information provided by this indicator, in the comprehensive evaluation of the role the greater the weight, the higher; and vice versa. According to the established hierarchy of AHP graph, the first step is to determine the evaluation index system, construction of the original matrix. Assuming there are m objects to be evaluated, n evaluation indexes, by evaluation of the original data constituting the original matrix , where the p_ij represents the i-th object to be evaluated Evaluation of the j-th index raw data, i = 1,2,3  m, j = 1,2,3  n. This study evaluated the object is a guide to filling the city under the nine counties (districts, cities), so m = 9; evaluation have 15, then n = 15. The third step is to calculate the index of the j-th Entropy ej: The fourth step is to calculate the n-th evaluation of entropy w_j:

Study on Evaluation of Nanchong Ecological Civilization Construction Based on AHP-Entropy Method