<p>This study focuses on the limitations of enhancing the sustainability of AI-assisted restoration and iterative interaction through the two paths of ‘assisted restoration’ and ‘artistic visual identity’ based on stakeholder perspectives and using heritage as a case study for application scenarios. This study adopts a mixed qualitative and quantitative approach to collect primary data. Through a systematic analysis of the in-depth requirements of heritage content, four strategic pathways were reconstructed in this research: AI-assisted restoration, cultural heritage characterisation, digitalisation pathways, and strategic design. Furthermore, integrating the pre, mid and post stages of project strategy design with the six processes of IDEO design thinking, the DTH-AI framework model was constructed. The sustainability strategy model DTH-AI and its application pathway framework for the integration and application of digital intelligence is finally constructed, and evaluated by a focus group composed of relevant stakeholders, which verifies the innovation of the research framework, effectively solves the sustainability problem in the process of AI-assisted restoration and iterative interaction, It provides solid theoretical support and methodological guidance for the sustainable digital intelligence development of other similar cultural heritages.</p>