Based on the characteristics of geometric symmetry of the concentrating solar collector system, a moving accumulative method is put forward, which is used to compute the solar flux distribution of the absorber. Using the ray tracing method to deduce the moving accumulative mathematical model of the absorber flux distribution, the model can effectively convert the ray tracing process into rotary or rectilinear motion. Therefore, the numerous equations of rays and absorber calculation are avoided. The moving accumulative programs are compiled and the absorber solar flux distributions of the dish system and parabolic trough system are calculated by Visual C++ software. Then the results are compared with references, which validate the correctness of the moving accumulative mathematical model. The result shows that, in dish system with cavity receiver, calculation of 6.10×108 rays need 112 s, but calculation of 9.648×107 rays just need 16 s and calculated results are basically consistent. The moving accumulative method calculation process is relatively simple and the computational efficiency is improved, which can provide reference to collaborative optimization for the symmetry solar concentration and collector system.