Under the developing of economy, China begins to expand its seaport system. Now the nations ambitions are well reflected through the recent rise of its container ports and their ability to redirect global shipping network. But as a developing country, the fiscal burden may not afford so many investments of seaport, and the government has realized that the economics boom has been achieved despite an overloaded and poor functional infrastructure. So the private investment is encouraged with the Chinese government. On the foundation of introducing the sources of risks, this paper use the Monte Carlo simulation to calculated a case-based vehicle seaport infrastructures NPV. The characteristic of the NPV model is that we assumed the discount rate as a random quantity that equals to the LTBOR. The result of the simulation shows that the project is worth for private investor to invest. Also, we take us the compare between the NPV of the project and the NPV of the national bonds to show only in the situation that the NPV of the project is higher than that of the risk free interest rate, would a private would like to invest. Otherwise, the government should compensate the balance between the project and the risk free interest rate.