Detecting transmission equipment for a vehicle gauge is fixed in an engine room of a vehicle and on a gauge. The detecting transmission equipment contains: a control box including: a first circuit board having a calculating module; a plurality of connecting ports, and each connecting ports being coupled with a first transmission cable; a power port welded on the first circuit board; a wireless transmission module welded on the first circuit board and coupled with the calculating module; and a receiver fixed on a gauge panel. The receiver includes a second circuit board having at least one second transmission cable connected with the gauge panel; a wireless receiving module welded on the second circuit board to receive data of the vehicle, and the data is displayed on the gauge panel via the at least one second transmission cable.