Abstract: As a critical carrier for the integration of energy and transportation systems, the highway micro-energy grid involves multiple energy forms with complex intercoupling relationships. Therefore, a comprehensive performance evaluation of such systems requires integrated consideration across multiple dimensions, including technical performance, economic costs, and environmental impacts. This study focuses on the highway micro-energy grid and establishes a multi-attribute evaluation index system comprising five dimensions: energy efficiency, reliability, economy, environmental impact, and social benefits. A VIKOR-GRA-based multi-criteria evaluation method is applied to assess the micro-energy system. The research provides a scientific basis for the planning, design, operational optimization, and decision-making of highway micro-energy grids, while also offering a new analytical perspective for similar comprehensive evaluation problems.