This study investigates the design of age-friendly furniture for elderly individuals in Liaoning Province, China, aiming to integrate interdisciplinary insights with user-centered methods. It explores how furniture can support independence, safety, comfort, and emotional well-being while reflecting cultural and social preferences of older adults. The study addresses the gap in current furniture design, which often overlooks the specific ergonomic, psychosocial, and cultural needs of elderly users. A mixed-methods approach was employed, combining quantitative surveys with 180 elderly participants and qualitative semi-structured interviews with seven participants. Purposive sampling was used for qualitative interviews, while stratified sampling guided the survey. Quantitative data were analyzed using descriptive statistics, correlation, ANOVA, and regression to identify priority features, while qualitative data underwent thematic analysis to extract user needs, pain points, and cultural considerations. Triangulation of findings ensured robustness and depth of insight. Results indicate that armrest support, stability, accessibility, and seat height are critical for overall satisfaction, while comfort, usability, and alignment with daily routines were emphasized in interviews. Emotional attachment, cultural resonance, and social functionality were also significant factors influencing furniture preferences. The study contributes a context-specific, evidence-based framework for age-friendly furniture design, integrating ergonomics, healthcare, cultural, and social considerations. Findings provide actionable guidance for designers, manufacturers, and policymakers and establish a methodological precedent for mixed-methods research in elderly-centered product design.