Differ from the local government based police bureaus which can investigate crime cases by using geopolitical relations and security concerns populations, it should be discussed that the methods to investigate criminal cases for railway police bureau facing such special security environment. This study discusses the security or safety maintenance of the railway through the relevant literature, then uses longitudinal and cross-sectional way to analyze criminal cases statistical data on Taiwan railway counting by the National Police Agency of Railway Police between 2005 and 2014. Moreover, this study compares the similarities and differences of security environments and criminal cases categories between the railway police and general jurisdiction of the county police. Besides, this study analyzes the criminal cases treatment behaviors of the National Police Agency of Railway Police by using Routine Activity Theory. Finally, This study make a conclusion that the characteristics of order the railway police bureau facing.