The principles of smart growth is transferred into seven quantified indicators,which reflact traffic,economy and housing.AHP method is used to determine the weight of seven indicators in urban development. Establish membership functions according to the ideal state of the ten principles and Fuzzy comprehensive evaluation on the quality of smart growth.We quantitatively analyze Frederick’s and Newcastle’s current situation,the indicators figured out that the smart growth success rates for the two cities were 73% and 71%. The principles of smart growth is transferred into seven quantified indicators, which reflact traffic, economy and housing. AHP method is used to determine the weight of seven indicators in urban development. Establish membership functions according to the ideal state of the ten principles and Fuzzy comprehensive evaluation on the quality of smart growth. We quantitatively analyze Frederick’s and Newcastle’s current situation, the indicators figured out that the smart growth success rates for the two cities were 73% and 71%.