From bounded rational view of decision-makers,it s studied the group investment decision-making rule optimization by introducing behavioral finance into group investment decision-making system.

Study on some characteristics of the investment decision in coal engineering projects;

Evaluation indices and method for investment decision of highway project;

The generation investment decision based on the Black-Scholes real option pricing model;

Application of realoptions in investment decision-making in oil and gas prospecting and exploitation;

The model of project investment decision-making based on comprehensive weight and its use;

The investment decision-making model for endowment insurance fund portfolio based on MNL;

Oil and fat factory's investing decision is a criterion of investing action ,it's result directly relates to cost ,quality and social effect of project of oil and fat factory ,then influences whether the construction of oil and fat factory succeeds or not ,only when the decision is right ,investment on oil and fat factory can be effectively controlled.

From the practice of investing decision on city construction projects,this paper establishes the investing decision supporting system of City construction projects based on fuzzy decision theory.