「社區」，自1990年代起一直是臺灣社會文化的關鍵字，從社區總體營造、921重建乃至地方創生，無一不與「社區」息息相關。臺灣的社區媒體曾一度興盛發展，發揮傳遞資訊、凝聚社區認同的功能。但由於無以為繼的政策，加上新媒體的衝擊，都不斷挑戰社區媒體的型態與意義。本文藉由媒介化理論檢視臺灣社區媒體的發展歷程，分析其興衰背後的結構因素，以及社區媒體如何形塑社區此一模糊易變的概念使之具體化，並創造獨特的媒介文化。

“Community” has been a keyword in the Taiwanese society and culture since the 1990s. The community empowerment, the reconstruction following the 921 Jiji earthquake, and even the revitalization of local communities are all closely related to the concept of community. Taiwan’s community media once thrived and played a role in transmitting information and consolidating community identity. However, unsustainable policies and the impact of new media continue to pose challenges to the form and meaning of community media. This article uses mediatization theory to examine the development of Taiwan’s community newspapers, analyze the structural factors behind their rise and fall, and consider how community newspapers can shape the vague and changeable concept of community and create a unique media culture.