In order to correct evaluation of radar system performance, the preference programming is introduced to the radar system performance evaluation. The multi-level value tree model is used to establish model, and the algorithm of RICH is extended to the solution of the multi-level value tree. The weight algorithm based on multi-level value tree is presented. Finally, the method is verified with a simulation example for synthetic performance evaluation of radars with uncertain information. The simulation results show that the method is effective, the radar performance under uncertain information can be ranked by it.