The invention relates to the technical field of household electricity meter installation acceptance and low-voltage circuit detection, and particularly relates to a device and a method for verifying zero and firing lines of a household electricity meter. The device comprises a host and a handset, wherein the host comprises a host CPU master control module, a host wireless communication module, a first host current transformer detection module, a second host current transformer detection module, a host LED indication module and a host power supply module; the handset comprises a handset CPU master control module, a handset wireless communication module, a handset signal load generation module, a handset power supply module, a handset display module and a handset button module; the handset button module is used for transmitting button information to the handset CPU master control module, and the handset CPU master control module is used for transmitting a control signal to the handset signal load generation module to generate load current; and the handset wireless communication module is communicated with the host to obtain a host detection result, and is used for displaying the result on the handset display module.