餐飲業服務評價是對企業進行多目標的綜合評價，在評價過程中，評價資訊的不確切和不完全性，決定了評價系統的灰色性，以灰色系統理論為基礎的灰色評估具有可行性。在評價模型中，採用集對分析法和二元對比-灰色法確定指標的賦權，考慮主客觀賦權優點，提高評價結果的準確性。本文提出了基於多層次灰色理論和SPA法的餐飲業服務評價模型，使評價結果客觀合理。

Food service quality assessment is a comprehensive multiple-objective evaluation on enterprise. The uncertainty and incompleteness of information available for evaluation determines the grey nature of the evaluation system, which makes grey systematic theory and set pair analysis assessment flexible. This paper provides multi-level of grey theory combined with binary contrast weight based food service quality evaluation model being more objective, reasonable and comprehensive based on set pair analysis. Finally, an example is used to illustrate the validity and simplicity of the method.