This design is for transplanting and using SQLlite database management system on μC/OS-II, the embedded real-time operating system. The design has used μC/OS-II, the open-source operating system, μC/FS, a file system transplanted on μC/OS-II, and the sqlite database. By studying their design principles and methods, clarifying the overall structure and the links between the various parts, I try to design a specific application in series with them. The design is divided into four modules: μC/OS-II operating system module, μC/FS file system module, sqlite database module and the final application module. The final system can be achieved in operations of addition, deletion, search and update of data and so on in the multi-task scheduling controlled by μC/OS-II. The operation of various commonly used functions can also be included in the final system.