With the rapid development of computer technology, network technology and database technology, the construction of postal informationization is developed rapidly, and in recent years, a lot of financial systems have successfully run on-line. Because of the continuously rising level of the informationization of the postal financial system, all kinds of crime committed by using computer technology become more and more common. In order to safeguard the informationization of the postal financial system and the interests of the users. We propose a electronic inspecting system,and investigate the problem about how to copy the date to database at the same time.This thesis starts from the research background, current condition and key technology of the electronic inspecting system, and during the first part, the introduction of the system’s logical structure and physical structure is included. Then the thesis focuses on analyzing the database snapshot technology utilized in data collection. The analysis includes the principles of the database snapshot technology as well as its design and implementation in the electronic inspecting system. In the function design part, the thesis introduces the system’s operation and maintenance function as well as service function, and both functions’design were detailedly explained. On the other hand, in the implementation part, it introduces the implementation methods and results for the system module. Finally, by testing the electronic inspecting system, the thesis verified its functionality and the availability and gave a objective assessment for the system’s implementationThe postal e-inspection system has been practically applied in Shaanxi Post. During the application, the real-time early warning function for financial data’s security was realized and the desired results were achieved.