介绍了实时操作系统 eCos的特点和开发架构。并通过实现eCos在MIPS32为内核的PNX8310嵌入式系统片上的移植，阐述eCos在嵌入式系统上的移植方法。重点讨论了移植过程中的一些关键点，分析了硬件抽象层的移植方法。该移植方案已经过实际测试，系统稳定可靠。 -The features and the program architecture of eCos are described．With the realization of transplanting eCos to PNX8310 with MIPS32 core，general method for transplanting eCos to an embedded platform is proposed．The key points for the transplant are discussed，and the hardware abstract layer is analyzed．This project has been validated to be stable and reliable．