Abstract: The paper states the basic contents of the methods developing the large-scale project of Intelligent Transport System (ITS) and introduces the features of development and construction of the ITS project. According to the characteristics，the system engineering methods of this kind of project are discussed, and especially, "the comprehensive integrations method combining qualitative and quantificational analysis" proposed by professor Qian Xue一sen as well as“Wuli-shili-renli method" (WSR) summarized by professor Gu Ji-fa are introduced. On purpose，the two methods are applied to the "Beijing bus intelligent dispatch system" project，which is in the charge of the author. After the project，the two methods are summarized methodologically. In order to apply the methods easily, several stages together with their aims and the contents during the process of developing the large-scale system-engineering project are suggested. Sums up the work aims to improve the development of ITS construction in our country.

Key words: system engineering, system integration, system inosculating, system

摘要： 论文阐述了大型智能交通系统工程项目开发方法的基本内容，介绍了智能交通系统工程项目开发建设的特色;并且阐述了这类工程项目开发的系统工程方法、特别运用了钱学森教授提出的“定性与定量相结合的综合集成方法”和顾基发教授总结出的“物理--事理--人理方法”来进行实践.基于“北京公交智能化调度系统”项目建设中对这两种方法进行的融合，以及工程完成后进行的方法论总结，为便于操作，本文提出了大型系统工程项目开发过程的几个阶段及其所要达到的目标、内容和具体实施方法.方法论的总结将有助于进一步推动我国智能交通系统工程项目建设。

关键词: 系统工程, 系统集成, 系统融合, 系统评估, 智能交通系统, 物理--事理--人理