本文以铁三院为例，对异地勘察设计作业模式从“现场设计”发展到“异地协同设计”的实践、存在的问题 及解决方法进行了分析。文中提到的部分方法已经在铁三院生产、管理中得到应用，并取得了较好的效果;对需 进一步改进的问题也提出了解决方案。

This paper analyses the problems in practice of long-distance survey and design mode which is changing from "local design" to "long-distance coordinate design" based on taking the Third Railway Survey and Design Institute as an example, presents the resolutions to the problems. Some of resolutions have been adopted in survey, design and management works场the Third Railway Survey and Design Institute and got good results.