In the field of embedded software development, the total involvement of application software transplanted in a variety of different platforms occupies more parts than expected in a whole project. In the face of smart devices based on different operating systems and hardware platforms, it’s of great significance to enhance the repeatability of application source code and the Cross-platform portability. Procedures for intelligent devices were designed according to the features of Windows Embedded CE6.0 as well as the characteristics of Visual Studio.net 2005, that the build environment. FmodMp3 player program was designed with managed language and transplanted to different intelligent devices, then the goal of cross-platform transplantation, that “code once written then ran in different platform” achieved. Paper also gave some advice about how to improve decompile capacity of managed programs.