Guangdong Supply and Marketing Cooperative serves as an important institution for the “Three Rural Areas” in the Guangdong-Hong Kong-Macao Greater Bay Area. Its digital transformation and optimization serve as powerful supports for rural revitalization. This paper systematically reviews the main practices and effectiveness of the digital transformation within the Guangdong Supply and Marketing Cooperative. It also analyzes the current development dilemmas faced in the construction of digital supply and marketing. Additionally, it proposes targeted solutions, including building a big data resource base, optimizing the digital supply and marketing cloud platform, developing digital public-type agricultural social service applications, establishing a new model of rural e-commerce, enhancing the traceability management system for agricultural products, and strengthening the construction of the digital human resources system. These proposals aim to further promote the strategy for revitalizing the countryside.