Taxicab, a type of paratransit system, provides transportation services with high privacy anddegree of freedom in which passengers can determine the entire travel route. For years, criminalactivities involving taxicabs have received public attention. Both taxi drivers and passengers canequal likely to be the victims of such criminal activities. To resolve this problem, some taxioperators have proposed passenger security programs employing wireless telecommunicationtechniques, however the effectiveness is still unclear. In this paper, we attempt to integratewireless telecommunications with geography information system (GIS) and global positionsystem (GPS) to formulate an intelligent taxicab operational security management system. It ishoped that this system will enhance safety and security and further enhance taxicabs' servicequality.