Over the past decade, Hungary has undergone fundamental reforms in its urban planning system, progressively incorporating the development of green infrastructure into the urban planning framework. Budapest, characterized by a relatively high endowment of green resources, faces diverse challenges and opportunities due to uneven resource distribution, making its experience valuable for reference. This study dissects the conceptual essence of green infrastructure, delineates the developmental trajectory of Budapest’s green infrastructure planning, and provides a detailed exposition of its construction from three perspectives: investigation, analysis, and classification of existing green spaces and natural resources; a planning framework oriented towards five major goals; and implementation management based on the “Government - Multi-stakeholder collaboration - Public participation” rights allocation model. The paper offers recommendations for green infrastructure planning in China, covering planning frameworks and content, implementation strategies, and safeguard systems.