The utility model belongs to the technical field of power failure seeks the restoration, a terminal equipment on -line automatic detection device is related to, including the casing that is equipped with the LCD screen, be equipped with control module, communication module and the battery of plug -in on the casing, last remote control interface, remote signalling interface and the alarm interface of being equipped with of control module, last USB?socket, automatic ejection formula SIM socket and the antenna of being equipped with of communication module, be equipped with the RS that checks meter below the communication module 485 the interface with maintain RS 485 the interface, does RS check meter 485 the interface with maintain RS 485 be equipped with a node monitoring module on the interface respectively, be equipped with the protecting cover on the battery. Be equipped with swing joint's lid on the casing, the coverage of lid includes control module, communication module and protecting cover. The utility model relates to a terminal equipment on -line automatic detection device changes the control module and the communication module of inside into plug -in to installed the lid additional, effectual solved current skill exist the model numerous and diverse, use inconvenient technical problem.