Recently, rapid rising of energy prices and impetus of global warming issues discussion in governments and enterprises make energy conservation as a famous doctrine. As the scale and quantity of energy-saving projects are increased, the emerging energy-related service industry takes advantage of opportunity to flourish. An innovative energy conservation project is an application of performance-based contract; it requires integrated domain knowledge of engineering technology and financing to fulfill the client’s requirements on efficiency of energy use and reduction of energy costs. Focusing on the service models in Taiwan’s energy service industry; this study collects ten cases of energy-saving performance-guarantee projects which use diverse performance-based contracts. Through analyzing the main differences among the contract clauses and identifying the problems existed in those contracts this study proposes some recommendations for revising the standard design-build contract for energy-saving performance-guarantee projects. Based on the research outcomes, the anticipated benefits of this study include reducing possible disputes in implementing energy-saving performance-guaranteed projects and improving the performance of implementing performance-based contract.