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Based on ARM embedded platform and WINCE system we developed an intelligent system oriented to test processes in the power supply industry. The intelligent instruments management system(IIMS) used RFID(Radio Frequency IDentification) technology and achieved the functions such as automatic instruments identification, automatic confirmation of the operators, the operations of warehouse site controller, electronic use records, etc. IIMS could be controlled remotely via LAN(Local area network). IIMS was applied to the test team in Dongguan Power Supply Bureau. The implemental results show that it greatly enhances instruments usage efficiency. The average time of check-in and check-out of each instrument in the regular operations drops from 69 seconds to 11 seconds. The implementation also shows that IIMS is responsive with stable performance.