以舟山、济南、厦门和宁波余慈4个城市为例，说明城市轨道交通线网规划专题研究工作的重要性和关注要点，提出在研究对象选择上要围绕核心问题，在开展时机上要先期或同步开展，在工作深度上要保证研究的结论科学、明确并具有前瞻性，在工作广度上要保证研究的结论周到、全面并具有协调性，从而促进规划线网更加适合城市特点和要求。

Taking Zhoushan, Ji'nan, Xiamen and Ningbo as example, illustrate the importance and key points of urban rail transit network planning special research work. This paper proposes that the object of study should be chosen around the core problem， and the starting time should be earlier than the main work or at the same time. The depth of the research should ensure the conclusion scientific, clear and forward-looking, the breadth of the research should ensure the conclusion comprehensive and thoughtful. The planning network will be more suitable for the city.