CDFL series electrical fire monitoring system is composed of a CDFL combined electrical fire detector, a CDFLS combined electrical fire detector, and a CDFL-Z electrical fire monitoring equipment (host) to receive residual current and temperature signals from field equipment to realize the alarm, monitoring, control and management of protected electrical lines. This system is suitable for intelligent buildings, high-rise apartments, hotels, restaurants, commercial buildings, industrial and mining enterprises, national key fire fighting units, petrochemical, cultural and educational health, finance, and telecommunications fields for remote metering, remote adjustment, remote control, and remote signaling of detectors scattered in the building to realize convenient monitoring and management.