本研究旨在探討室內設計五大核心元素——形狀、色彩、材質、空間與光線——對客戶滿意度之影響，並藉由德爾菲法與層級分析法（AHP）建立具實證基礎之評估架構。研究共邀請20位設計業界專家進行兩輪德爾菲問卷，確認五大構面及其下15項關鍵因素，並透過10位具代表性業主進行AHP問卷，以量化各構面與因素的相對重要性。
研究結果顯示，「空間」為影響客戶滿意度最關鍵的構面，其次為「光線」，顯示空間流動性、格局比例與自然採光是設計滿意度的關鍵驅動因素。此外，「色彩」、「形狀」、「材質」亦分別透過情緒象徵、意象傳遞與氛圍營造影響顧客評價。其中，「色彩與心理感受」、「形狀的心理影響」與「材質與空間氛圍」等子項目在其構面中具高度權重，突顯設計須整合感官與情感經驗。
實務上，研究建議設計師應優先處理空間動線與採光策略，再整合色彩、材質與造型以形塑整體氛圍，並可導入VR模擬與生理數據強化評估科學性。此研究不僅補足學界對設計滿意度因素之量化模型缺口，更為室內設計產業提供具策略性的溝通與決策依據。

This study investigates the impact of five core elements of interior design—form, color, material, space, and lighting—on customer satisfaction. Utilizing the Delphi Method and Analytic Hierarchy Process (AHP), the research establishes an empirically grounded evaluation framework. Two rounds of Delphi surveys were conducted with 20 industry experts to confirm the five dimensions and 15 associated key factors. Subsequently, 10 representative clients participated in the AHP survey to quantify the relative importance of each factor.
The findings reveal that “space” is the most critical dimension influencing customer satisfaction, followed by “lighting”. These results emphasize the significant role of spatial flow, functional zoning, and natural lighting in shaping positive customer experiences. While form, color, and material were relatively lower in overall weight, specific sub-factors such as “color and psychological perception,” “form and emotional symbolism,” and “material and spatial ambiance” demonstrated high importance within their respective categories, highlighting the value of emotional and sensory engagement in interior design.
Practically, the study suggests that designers prioritize spatial planning and natural light strategies, followed by the integration of color schemes, materials, and forms to create cohesive environments. The application of VR simulation and physiological data analysis is also recommended to enhance the scientific basis of design evaluation. This research not only contributes a quantitative model to academic discourse on design satisfaction but also offers a practical reference for communication and decision-making in the interior design industry.

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