In the context of the great development of Artificial Intelligence Generated Contente (AIGC) technology, the work aims to explore the development path of diversified architectural decoration patterns, and select the Leong San Tong Khoo Kongsi, an Malaysian Chinese ancestral temple as the research object to achieve efficient transformation and generation of packaging design using AIGC technology. Firstly, the current research and development status of AIGC and Leong San Tong Khoo Kongsi were sorted out and analyzed, and the necessity of using AIGC to design and transform traditional ridge decoration patterns at this stage was clarified. Secondly, starting from the decorative patterns on the roof of Leong San Tong Khoo Kongsi, the distinctive patterns in the decorative patterns on the roof of Leong San Tong Khoo Kongsi were analyzed, pattern and color factors were extracted from them, and the shape grammar was used to perform artistic redesign on the extracted factors. Finally, using AIGC technology, the designed patterns were digitized and selected from the output pattern library to meet the requirements for product packaging design applications. By combining traditional patterns with AIGC technology, effective design innovation practices have been achieved, providing new ideas and methods for the digital inheritance of traditional architectural decorative patterns.