The invention discloses an instrument for identifying and measuring wires from batched network cables. The instrument comprises a transmitter and a receiver. The transmitter includes a first housing, wherein the upper end of the first housing is provided with a joint port; inside the first housing are a first circuit board, a first micro controller, a first temperature sensor and a first heat radiating fin. The first circuit board is arranged on the first heat radiating fin; the first heat radiating fin is arranged on the back plate of the first housing. The lower end of the first housing is provided with a first air inlet protruding the outer side; the first air inlet is provided with a first axial-flow fan. The receiver includes a second housing with a probe thereon; inside the second housing are a second circuit board, a second micro-controller, a second temperature sensor and a second heat radiating fin. The second circuit board is arranged on the second heat radiating fin; the second heat radiating fin is arranged on the back plate of the second housing. The left side or the right side of the second housing is provided with a second air inlet protruding the outer side; the second air inlet is provided with a second axial-flow fan. The invention has the advantages of good temperature control and temperature lowering function, and prolongs the service life of the instrument.