The evaluation and decision making for the uncertainty problems, such that are subjective to personal likes and extremely dependent upon conceptual variations, during the conceptual design and initial planning stage are apt to depend on making use of the experience and ingenuity of engineers and specialists. It is desirable to be established the methodology of making the decision that is balanced in an overall perspective, especially when the decision is to be taken based upon multi-criteria objectives. The process of this decision making way is broken down into a hierarchy model, a grading model and an evaluation-decision model in this report. An analytical method for decision making based on these models is proposed through the technique of management engineering using the fuzzy theory in order to consider the conceptual, qualitative and indeteminable elements. As a typical example of applying the proposed method, the process of making choice on the transportation systems between two metropolises is presented here.