A method that employed CCD to measure radiant energy of furnace was proposed and corresponding measurement system was developed.The mechanism of measuring radiant energy with CCD was analyzed.A measurement model describing relationship between output voltage of CCD video camera and radiant energy was established.As the complexity and nonlinearity of the model

that would hinder the method from being put to practical use

and taking account of BP neural network capability of approximating any nonlinear function

a method of using BP neural network as measuring radiant energy model was presented.Experiments show that the method is feasible and has satisfactory measurement precision.