In the digital age, AIGC technology has brought new opportunities and changes to the design of non-legacy products. This paper deeply discusses how AIGC enables the design of non-legacy products, and analyzes its positive role in innovating design concept, improving design efficiency and expanding design expression forms. The application of artificial intelligence in the design of non-legacy products is discussed. This paper further expounds the research methods and processes of integrating artificial intelligence into the design and practice innovation of non-legacy creative products, and demonstrates the specific application of artificial intelligence in the generation system of non-legacy creative products through practical case studies. The challenges and prospects of the design and practical innovation of non-legacy creative products are summarized. Taking the digital cultural creation of the Forbidden City as an example, AIGC technology has been used to develop interactive functions, enhance users’ interest and participation in the culture of the Forbidden City, and let the culture of the Forbidden City enter the public life in a more vivid and interesting way. At the same time, it considers the challenges and coping strategies faced in the application process of AIGC technology, aiming to promote the innovative development of non-heritage creative product design in the new era, and promote the inheritance and dissemination of intangible cultural heritage.