The utility model relates to an optical cable fault point detecting system based on internet, include the optical cable generaI investigation appearance through the communications network interconnection, and a processo, mobile terminal, cloud service platform and PC terminal, optical cable generaI investigation appearance includes photoelectric detector and battery, photoelectric detector passingsignal line connection has electric quantity detection module, wireless network module, alarm module, temperature monitoring module, touch display screen curtain and IO interface, the battery passesthrough power cord and photoelectric detector, wireless network module, alarm module, temperature monitoring module, touch display screen curtain and IO interface link to each other, the utility modelhas the advantages of location accuracy, convenient to use, use manpower sparingly, the information sharing is convenient.