Buried pipeline stray current interference monitoring device and system

The utility model provides a buried pipeline stray current interference monitoring device and system. The monitoring device comprises a test piece box and a test line. The test piece box comprises a box body and a box cover, and the box body is detachably connected with the box cover. The box body comprises a base, a test board, a test piece groove and a through hole, the test board is formed by outwards protruding the base, the test piece groove is formed by inwards sinking the test board, and the through hole is communicated with the test piece groove and the outside. A test wire penetrates through the through hole to contact with the bottom of the test piece groove; a test piece exposing hole is formed in the surface of the box cover. The system comprises the device, a pipeline, a test pile, a data recorder and a reference electrode. The utility model has the beneficial effects that the artificial damage to the test piece in the field operation process can be avoided; and test piece embedding, sampling and