在深入研究了嵌入式系统特点的基础上，分析了备份/恢复软件的设计思想、系统功能及特点，并运用面向对象的软件工程方法完成了软件系统的总体设计，定义各个功能模块，描述了业务逻辑和分析了备份/恢复的过程，该方法简单、实用，占用系统资源少，具有良好的鲁棒性、可移植性和扩展性。并以WindowsCE.NET 和个人数字助理(Personal Digital Assistant，PDA)为软硬件平台实现了该软件。

关键词：嵌入式系统，个人数字助理，备份，恢复

Abstract: On the basis of deep research on characteristic of embedded system, multithreaded and dynamic link libraries technologies. According to the design concepts, system functions and characteristic of Backup/Restore are analyzed, and its holistic design is finished, every functional module is defined, the service logic is described and the procedure of backup/restore is analyzed. The solution is simple and practical, needing a little system resource, and it has good robustness, scalability and portability. And then realize this software system based on Windows CE.NET and PDA software and hardware platform.

Keywords: Embedded System; Personal Digital Assistant; Backup; Restor