Cable fire alarm method and system

The invention provides a cable fire alarm method and system. The cable fire alarm method comprises the steps that a first temperature sensor and a first smoke sensor are arranged on a cable; a first image sensor is arranged at the corresponding position, the first image sensor carries out image shooting facing the first temperature sensor and the first smoke sensor, and the first image sensor is used for obtaining image data of the cable position where the first temperature sensor and the first smoke sensor are located; performing standardized coding on the temperature data, the smoke data and the image data of the corresponding cable positions to obtain feature matrixes of corresponding types, and splicing the feature matrixes of the corresponding types to obtain a standardized multi-dimensional feature matrix; and constructing a trained sample set, inputting the multi-dimensional feature matrix into a corresponding BP neural network model for training to obtain a trained cable fire prediction model, and per