Abstract—Citizen card system. Citizen card system, commonly based on SOA (Service-Oriented Architecture) has brought great comfort and convenience to the locals, drumming up the progress of Urban Information Construction. However, the application of citizen card system has not been popularized for some technical reason. This paper briefly introduces its current situation, and illustrates the structure of the system according to the estimated effect and the adoption of SOA. On such analysis, the paper discusses the pros and cons of citizen card (system), < Final Year Projects > pointing out the safety and management problems in details. In the end, the paper draws a future picture of citizen card (system), such as internet access and mobile-phone citizen card.