When enterprises invest in a project,they often face the irreversability,the redound uncertainty,the leverage effect and delay effect of the investment. However, it is often frustrated by dogmatic reliance on traditional approaches to financial evaluation.We mainly analyzed the shortcomings and the risk-bias of the managers when the traditional methods are used, and then used the real-options to evaluate the feasibility of the investment.At last,we combined the two methods and created a new method which is the matrix method to evaluate the feasibility of the investment.