This study proposes the establishment of a producer-centered export organization model, the “Mushroom Korea Export Cooperative Marketing Board,” as a solution to stagnating domestic consumption and sluggish exports in the Korean mushroom industry. The research draws on a literature review, statistical analysis, government policy review, and comparative case studies of overseas models such as Zespri, Enza, and The Greenery. The cancellation of K-MUSH’s designation in 2024 revealed the limitations of government-led models, while successful cases emphasized autonomous producer governance, strict quality control, sustained R&D investment, and strategic government support. Based on these findings, this study proposes a phased strategy to establish a cooperative model grounded in democratic governance, legal reform, levy-based self-financing, and collaborative branding and marketing. If implemented effectively, the model is expected to stabilize export prices, enhance quality, increase farm income, and foster sustainable development in the mushroom sector.