Based on the introduction and analysis of P2P related basic knowledeg and technological method, we put the focus on how to do resource search and data communication via P2P. Meanwhile, a P2P application program, ShareNet, was built.

• 本文是在分析了P2P网络应用的相关基础知识以及技术实现手段的基础上,重点研究了如何利用P2P技术去进行资源搜索以及数据通讯传输,并自行设计了一个P2P应用系统ShareNet。