中文摘要：

近年来,Blog的发展异常迅速,其影响力日益扩大,这主要归功于其所采用的核心信息技术。与传统的Web信息技术相比,Blog采用的核心信息技术在信息共享和传播方面具有突出的便捷性、新颖性和高效性。全面而深入的研究了Blog所采用的三大核心信息技术：RSS、Trackback和Tag,详细的分析了这些信息技术的应用流程,深入的揭示了其功能机理,全面的阐述了其对Blog信息传播与资源共享的独特作用。掌握了Blog信息传播的本质和规律,认清了Blog高速发展的内在动因。

英文摘要：

In recent years,Blog develops very quickly and influences society widely,which mainly attribute to core information technologies applied by blog.The core information technologies applied by blog more convenient,novel and efficient than traditional information technologies of web.In this paper,three information technologies applied by blog,RSS Trackback and Tag,are researched in depth.Their application flow are detailedly analyzed,functional mechanism are deeply revealed,and special effect on information dissemination and sharing of Blog are systematically detailed and graspied rules on information transmission of blog and identifying reasons on high-speed development of blog.