A nonlinear example was studied,through the study of ANFIS,and corresponding fuzzy model was established.Some simulation experiments were carded on.Direct effect of adaptive network based fuzzy inference systems(ANFIS)about training errors,the number of membership functions and ANFIS output is researched by ANFIS of MATLAB,which achieves good results.The simulation results show that ANFIS is very effective to identify the nonlinear system and its accuracy is very high.