Based on an analysis of the characteristics of evaluation and decision of metropolis commuter rail transit planning,a discussion of the index system and method is conducted to evaluate the metropolis commuter rail transit line network planning.

From the issue of residence and workplace spatial organizing, the related literatures of urban commuting including related theories and models, the spatial and social factors of commuting behavior, excess commuting and spatial mismatch etc.

On the basis of investigation of inhabitant trips,the article uses the related information such as the proportion of commuting tool and distance characteristic of commuting tool to elaborate the commuting tool characteristic.

As a main character of urban daily traveling, rationality of commuting spacial organization determines traffic organization in a certain extent.

Using the data of 1,000 questionnaires, the authors try to analyze the behavior of intra-urban migration and residential suburbanization, the second house and seasonal suburbanization, and other correlative spatial behaviors including commuting, traveling and shopping of urban residents in the process of suburbanization in Beijing.