Browser/Server structure (B/S structure) structure that the browser and the server structure. It is with the rise of Internet technology, on the C/S structure, a change in the structure or improvement. In this structure, the user interface work is achieved through the WWW browser, and very few parts of business logic in the front (Browser) to achieve, but the main business logic on the server side (Server) implementation, the formation of the so-called three-tier 3-tier structure. This greatly simplifies the client computer loads, reduce the system maintenance and upgrades cost and effort, reducing the overall cost of the user (TCO). View the current technology, local area network set up B/S structure of the network applications, and through Internet / Intranet mode, database applications, is relatively easy to grasp, the cost is lower. It is a one-time development in place, to achieve a different staff, from different locations, different access methods (such as LAN, WAN, Internet / Intranet, etc.) to access and manipulate a common database; it can effectively protect the data platform and administrative access, the server database is also very safe.