Avionics system is an important part of modern fighterand it is an important support means to achieve mission integrationcapability integration and resource integration.The performance of combat aircraft is closely related to the effectiveness of avionics system.Aiming at the problems of complex evaluation index system of avionics system and great divergence of expert evaluationsthis paper designs an effectiveness evaluation method for avionics system based on wavelet neural network methodand presents an avionics effectiveness evaluation system.Based on the Analytic Hierarchy Process (AHP)the index system is constructed.Finallythe weights are obtained through judging and scoring of the expertsand the judgment value is modified through wavelet neural network.Compared with avionics effectiveness evaluation under specific capabilitythe evaluation system has more abundant indexes and good correction effect on the weights of the indexeswhich provides a tool prototype support for avionics system effectiveness evaluation.