The Indonesian Music Museum in Malang City faces challenges including limited space, a vast collection, and the need for flexibility in accommodating for community and public activities. This study proposes a multifunctional smart furniture design that can serve as a display space for music collections, including cassettes and vinyl records, as well as social and interactive media. The furniture is designed to be portable, energy-efficient, and responsive to the presence of visitors with motion sensor technology and automatic lighting. This innovation supports the principle of sustainability through energy efficiency in line with “SDG 7: clean and affordable energy”. This furniture design provides environmentally friendly solutions such as space efficiency and dual functions in limited spaces, supporting the development of sustainable public spaces in cities by “SDG 11: Sustainable Cities and Human Settlements”. The methodology used is a double-diamond process: discover, define, develop, and deliver. The design process in the development and delivery stages includes brainstorming, exploration of design ideas using Sora AI, and designing self-exploration to enrich ideas and optimize the design. This article presents a case study on the application of sustainable design solutions in cultural spaces, considering physical and resource limitations. This research led to the development of a smart furniture design that is multifunctional, portable, energy-efficient, and responsive to its users.