Abstract: Against the backdrop of agricultural modernization and rural governance transformation, how non-governmental organizations embed themselves in rural public management and fulfill their collaborative governance functions has emerged as a critical research topic. Taking the Maker Alliance in Xinzhuang Village, Xingshou Town, Changping District, Beijing as a case study, this paper constructs a 'Subject-Process-Outcome (SPO)' analytical framework to examine the practical mechanisms and governance effects of non-governmental organizations' collaborative participation in rural public management. The findings show that the Maker Alliance has gradually evolved from an early spontaneous environmental group into an institutionalized entity, forming a stable 'four-in-one' collaborative governance structure with the village committee, professional operation enterprise and community public service center. In operation, the alliance performs core functions including policy transmission, resource integration and multi-stakeholder coordination via Party building leadership, cross-sector resource brokering, platform construction and integrated online-offline interaction. Its governance outcomes are systematically manifested at individual, community and institutional levels. Meanwhile, the long-term development of the alliance still faces practical constraints such as external resource dependence, elite reliance and ambiguous boundaries of rights and responsibilities. Accordingly, this paper proposes optimized development paths from three dimensions: rationalizing government-society relations, improving organizational governance and deepening multiparty collaborative mechanisms.