A delay measurement circuit includes a transporting path selector, first and second delay measurement devices, and a controller. The delay measurement circuit forms a plurality of transporting loops through two of a first reference transporting conductive wire, a second reference transporting conductive wire, and a tested transporting conductive wire according to a control signal. The first delay measurement device respectively measures part of the transporting loops to obtain a plurality first transporting delays. The second delay measurement device respectively measures part of the transporting loops to obtain a plurality second transporting delays. The controller generates the control signal, and obtains a transporting delay of the tested transporting conductive wire according to the first transporting delays and the second transporting delays.