The porting of embedded OS WindowsCE.net based on Intel Pxa270 processor Zhang Jing Li Xin-guang Department of Computer Science and Technology, Guangdong University of Foreign Studies Guangzhou, 510420, Guangdong, China Abstract: The development of embedded operating system is Restricted to its porting. This paper introduces a Embedded operating system porting method based on microprocessor Intel Pxa270,and solve the main and difficult question . The porting is realized on EEliod Evluation development board, and has been applied in a project of the Guangdong University of Foreign Studies -- Embedded Multimedia Dictionary.By actual operation, Platform operation is stable and reliable.Many of its performance targets were achieved design requirements. Keywords: WindowsCE.net; Intel Pxa270 processor;porting;Embedded applications