The　meter-reading　and　monitoring　terminal　based　on　GPRS　(General　Packet　Radio　Service)　technology　for　distribution　transformer　is　designed,　which　applies　a　32-bit　ARM7　chip.　Its　hardware　is　divided　into　the　system　part　and　the　peripheral　part.　The　system　part　includes　CPU,　memory,　RTC　(Real-Time　Clock)　and　reset　circuit.　The　peripheral　part　is　composed　of　RS-232/485　chip,　GPRS　module,　infrared　communication,　switch　state　detection,　temperature　sensor　with　mono-wire　bus.　Its　software　is　based　on　μC/OS-II　embedded　operating　system,　with　multi-task　and　multi-buffer　framework.　The　CPU/peripheral　interfacing,　operating　system　transplant,　multi-functional　watt-hour　meter　reading,　temperature　detection,　GPRS　communication　and　data　transmission　protocols　are　detailed.　Its　field　operation　is　stable　and　reliable.