Abstract: The development of launch vehicle technologies reflects a key indicator of national technological strength. This study proposes a comprehensive evaluation system for the technologies from an "input-output" perspective across four dimensions: technological resources, capabilities, benefits, as well as social and environmental impacts. By integrating the Analytic Hierarchy Process (AHP), expert weighting method, and entropy weighting method, the weight of each indicator is systematically determined, while Grey Relational Analysis (GRA) is applied for comprehensive evaluation. Finally, the effectiveness of the proposed evaluation system and methodology is verified through a case study on sheet metal related technologies at Company T. The established indicator system balances considerations of technology resource allocation, capability development, and final benefits, providing a systematic methodological support for assessing and selecting future rocket manufacturing technologies. Moreover, it offers valuable theoretical and practical references for the technological evaluation of Chinese aerospace industry.