Regarding the distinctive characteristics of tourism infrastructure, ”The Guidelines for the Economic Benefit Evaluation and Financial Planning of Infrastructure Investment: The Special Issue for Tourism Project” has been developed by the authors to serve as the official guidelines of Tourism Bureau, Ministry of Transportation and Communication. The Guidelines provides for the project assessments to tourism sectors, furthermore, for the budget allocations to the Council of Economic Planning and Development, Executive Yuan. This paper takes the Sun Moon Lake National Scenic Area as an example to demonstrate the Guidelines and its applications. It conveys the methodology of economic benefit evaluation for the intangible and tangible assets of the tourism infrastructure, the special operational practices to monetization the intangible values of the national scenic area, the decision-making indicators of the economic evaluation and financial analysis of the investment during year 2008 to 2011, and the policy implications for government investments in the tourism infrastructure.