Abstract: Offshore floating energy systems serve as a critical energy foundation for marine resource exploitation and utilization. Due to the complexity and inherent uncertainties of the marine environment, it is essential to fully account for multi-dimensional impacts covering economic, environmental, risk and social dimensions. Centering on the above four dimensions, this paper develops a comprehensive quantitative analysis framework tailored for such systems. Specifically, assessment indicators are first established to evaluate the system''s economic performance and environmental impact. Subsequently, the Analytic Hierarchy Process, expert scoring method, and fuzzy comprehensive evaluation are integrated to quantify system risks and social influences. Finally, the entropy weight method is employed to synthesize these four categories of influencing factors, thereby forming a quantitative approach for comprehensive impacts of multidimensional factors. This study provides theoretical support and methodological tools for the planning, design, and optimization decision-making of offshore floating energy systems.