Previous studies indicated that traditional NPV (net present value) and DCF (discounted cash flows) methods do not consider the managerial flexibilities of investment projects. Thefore, NPV and DCF usually lead to inappropriate decisions of investments. This study compared the traditional capital budget and the real option in uncertain investment project evaluations. Empirical analysis used the Kaohsjung Modernized Comprehensive Stadium BOT project as an example. The results showed that the investment project has considerable financial risk. Therefore, management units should control the building cost and operating income as well as improving other financial incomes to avoid financial crisis.