Liod270 based on intel Xscale PXA270 embedded microprocessor, its highest basic frequency may reach 520MHz, can run Linux 2.4.21 and Linux 2.6.11 operating systems, supports GUI embedded type graphical user interface, such as Tiny-X, QT/E and so on, provides whole drive and application procedure. It also supports the latest Windows CE / Windows CE 6.0 operating system. It has provided the large choice space for teaching of university. The system is formed with module and extender board, connection resources of the extender board is rich and may used for school teaching experiment, it has detailed embedded type development theory instruction book and the experimental hands-on instruction book; The core board may used by teacher for cientific research directly. PXA270 has joined Wireless MMX technology, greatly promoted the multimedia processing ability; PXA270 has also joined Intel SpeedStep dynamic power source management technology, reduce mobile equipment power loss furthest under the guarantee of CPU performance. It be suitable not only for teaching platform of embedded software course in specialized computer, electron, correspondence, software and so on, but also for referenced platform used in vehicle-carry entertainment, industry control, portable equipment, medical instrument merchant and the scientific research uni