既有研究雖對城市農耕行動有所討論，但並未進一步探究參與式規劃設計如何反應在農耕行動上，進而展現公共空間的價值，甚至是公共領域之空間形塑。本研究旨在探討公民於新竹市東區進行食物森林的空間建構，及其後續的經營與維護脈絡。運用參與式規劃設計作爲該空間建構的方法，並以哈伯瑪斯的公共領域理論進行分析，探討公民於食物森林内互動產生知識外溢，以及對生活環境的批判價值。研究方法採文獻分析、參與觀察、深度訪談方式進行相關資料蒐集。本研究發現，參與式規劃設計於新竹市綠園道食物森林空間得以被操作與實踐，仰賴專業者的知識傳遞、地方居民的積極參與、及公部門的資源協助。食物森林採取共耕共享、友善環境耕作、及重視生態層次等方式進行運作與維護，其目的在於不僅建立具備公共性的環教場域，亦涵納與兼容傳統公共空間排除在外者，使此空間充滿包容、互動與思辯的特點，浮現出另類的公共空間（領域）特質。本研究揭示食物森林公共空間的獨特性，除了提供都市農耕在台灣能以另一種經營方式展現外，希望用以增加地方社會的凝聚力，以及宣揚永續環境概念的公共領域為最終呈現之目標，期盼朝向真實的公民城市邁進。

This study is to investigate the spatial construction of the food forest in the eastern part of Hsinchu City and its subsequent operation and maintenance. Participatory planning design is used as the method of spatial construction, and Habermas' public sphere theory is used to analyze the spillover of knowledge from citizens' interactions in the food forest and its critical value to the living environment. The research method used was documentary analysis, participant observation, and in-depth interviews to collect relevant data. This study found that participatory planning and design in the food forest space of Green Belt in Hsinchu City was made possible by the knowledge transfer of professionals, the active participation of local residents, and the assistance of public sector resources. The food forest is operated and maintained in a shared farming, environmentally friendly farming, and ecologically sensitive manner, with the aim of not only creating a public and educational environment, but also incorporating and accommodating those who are excluded from the traditional public space, so that the space is full of inclusive, interactive, and debatable characteristics, and emerges as a different kind of public space (sphere). This study reveals the uniqueness of the public space of the food forest, which not only provides an alternative way of operating urban farming in Taiwan, but also aims to increase the cohesiveness of the local community and promote the concept of sustainable environment as the ultimate goal of the public sphere, in the hope of moving toward a true civic city.