Nanyin (southern music of Fujian Province of China) was selected as one of the first entries in China’s National Intangible Cultural Heritage List in 2006, and in 2009, it was included in the Representative List of United Nations Educational, Scientific and Cultural Organization (UNESCO) of the Intangible Cultural Heritage of Humanity. In this study, we constructed a scientifically sound evaluation framework for assessing the dissemination effectiveness of Nanyin by combining the Delphi method with the fuzzy analytic hierarchy process (Fuzzy-AHP). We first developed IoT technology to facilitate the transmission of related music and the collection and analysis of data. Next, we employed the Delphi method to gather expert opinions and identify key evaluation criteria. Subsequently, Fuzzy-AHP was used to quantify the weights of these criteria, creating a comprehensive and systematic evaluation model. The model includes five primary indicators: diversity and coverage of dissemination channels, content quality, media exposure, audience engagement, and audience satisfaction, along with their corresponding secondary indicators. To validate the practical application of this framework, we conducted an empirical analysis using the program “Hundred Birds Returning to the Nest” as a case study. IoT technology was employed to collect and disseminate relevant data, facilitating the analysis through the Delphi method and Fuzzy-AHP. The results showed that the developed evaluation framework effectively provides reliable data support and guidance for future Nanyin dissemination strategies.