Fault warning and diagnosis for electric power optical fiber cables have a tremendous impact on the power dispatch.On the basis of the analysis of the causes of cable faults and the existing detection methods

this paper proposes a scheme

in which it realizes remote monitoring for electric power optical fiber cables by using an Optical Time Domain Reflector（OTDR）.It designs an OTDR-based remote monitoring system

compiles the related software for host computer and the lower device

i.e.OTDR and then performs laboratory tests.The results indicate that this system can implement remote operation and two-way communication between the host computer and OTDR and perform accurate fault detection and location.