This research focused on the priority decision for establishment criteria on the effects which environmental sculptures in urban areas. The analysis performed in this study used the AHP(Analytic Hierarchy Process) that is recognized as a useful decision-making tool to select and evaluate alternatives through "pairwise comparison" in the context of hierarchical decision structure. The results obtained from the analysis drawn by collecting the professional opinions of 5 experts for environmental sculptures are as follows: 1. The orders of establishment criteria priorities on environmental sculptures were harmony of environment > symbol > public > function. The harmony of environment was the most important priority because it showed the highest weight of criteria. 2. The alternative priorities of environmental sculptures were the meaning of work>setting place>social contribution >physical quality. The meaning of work showed the highest change in the weight of alternative. 3. The sensitivity analysis of environmental sculptures demonstrated that the rate of change in the alternative priorities of the public was stabilized although the criteria importance varied, while the harmony of environment, the symbol intimated and function priorities had their rates of weight changed if the criteria priorities were high.