The utility model discloses an on -vehicle data of wireless automobile -mounted terminal and railroad locomotive management system that changes outfit, include: treater, wireless communication module, intelligent IC -card seat or CAN communication module, memory, the treater passes through UART and is connected with wireless communication module, the treater passes through SPI and is connected with the IC -card seat, perhaps, the treater passes through the CAN interface and is connected with CAN communication module, the treater is connected with the memory, the utility model discloses still disclose the on -vehicle data of the railroad locomotive management system that changes the outfit, include: wireless automobile -mounted terminal, server, wireless automobile -mounted terminal with communication connection carries out between the server, so, when the server reachd warehouse entry sluice gate at the locomotive, it was right to judge whether need the locomotive changes the outfit, carries out changing the outfit of on -vehicle data if then show information for police dispatch with the suggestion personnel of changing the outfit, can avoid the omission of on -vehicle data to change the outfit, and wireless automobile -mounted terminal can verify the on -vehicle verison imformation who changes the outfit after accomplishing to the mistake of avoiding on -vehicle data changes the outfit and omits and changes the outfit, thereby improves driving safety.