Optical fiber attenuation entire online monitoring system and monitoring method

The invention discloses an optical fiber attenuation entire real-time online automatic monitoring method, and belongs to the field of optical communications. The method mainly comprises the following steps: remotely collecting light-receiving power and light-emitting power of online network equipment, acquiring an optical fiber attenuation value through the computation, comparing the optical fiber attenuation value with a standard attenuation value (acquired through theoretical computation or actual measurement), and analyzing; when the different value between the current attenuation and the standard attenuation meets the requirement (namely in a certain range), storing the collected light-receiving power and the light-emitting power to form a historic trend curve so as to perform the equipment deterioration analysis; if the different value between the current attenuation and the standard attenuation is excessive big, the system recording and giving an alarm. The invention mainly provides an optical fiber att