The invention discloses a state monitoring terminal processing device which is used for a smart power grid. The state monitoring terminal processing device comprises an ARM operation processing unit, a power control module, an RS232 interface module, an RS485 interface module, a ZieBee communication module, an Ethernet interface module, a GPRS timing module, a FLASH module, an SDRAM module, an EEPROM module and an RTC clock module, wherein the power control module, the RS232 interface module, the RS485 interface module, the ZieBee communication module, the Ethernet interface module, the GPRS timing module, the FLASH module, the SDRAM module, the EEPROM module and the RTC clock module are in bidirectional connection with the ARM operation processing unit. The state monitoring terminal processing device further comprises a first power module and a power isolation module connected between the first power module and the RS485 interface module. The state monitoring terminal processing device has the advantages of being high in universality, flexible in networking, high in practicability and the like, and has the high popularization value.