The utility model relates to a low-voltage combination intelligent unit device. The low-voltage combination intelligent unit device comprises an analog operation board, a switching value input plate, a switching value output plate, a main CPU plate, a CT/PT analog quantity acquisition plate, a transmitter direct current value acquisition plate and a power plate. The CT/PT analog quantity acquisition plate and the transmitter direct current value acquisition plate are connected with the main CPU plate through a backboard data bus. The analog operation board, the switching value input plate and the switching value output plate are connected with the main CPU plate through a backboard data control bus. An Ethernet communication interface module is further connected with the main CPU plate. By means of the low-voltage combination intelligent unit device, intelligent acquisition of intelligent transformer station switch gap state quantities and remote measurement information can be realized. Control on switch disconnecting links, etc. can be further achieved. Meanwhile, the process level network and the station level network of an intelligent transformer station can be further accessed. Digitalized acquisition and transmission of remote signaling data and remote measurement data of the transformer station and intelligentized control on switches are achieved. The number of equipments inside the station is smaller. The reliability and the running stability of the intelligent transformer station are enhanced.