本文以經濟學中的「公共財」概念，討論網際網路資源共享的科技特性。以網路技術中的P2P（peer to peer，意即同儕間資源共享）為主體，本文先探討「公共財」的非獨特性（non-exclusive）以及非競爭性（non-rivalrous）的特質，並論證為何網際網路即便在現行私有產權意識高漲下，仍舊具備公共財的意涵；第二部份則以P2P為例，說明網路的點對點資源共享與共創機制如何是這項科技得以進步的主因；最後則分析網路公共化過程中的一些正面與負面的外部性，並且簡要的介紹目前網路民主團體的網路民主化訴求。

The article explores the public dimension to the internet technology in terms of the notion of public goods. Focusing on the peer-to-peer (p2p) file sharing phenomena, which have been a major driving force behind the progress of this technology, the article analyzes how the internet communication could be characterized as a non-exclusive and non-rivalous public asset, despite the fact the proprietary ideology dominates its current development. The article also analyzes the positive and negative externalities of the p2p phenomenon, and briefly introduces several democratization movements on the net.