The model-free learning adaptive control (MFLAC) of a class of nonlinear discrete-time systems is presented in this paper. No structural information,mathematical model,external testing signals and training process are needed,it is designed only by using I/O data of the con-trolled systems. The unmodelled dynamics do not exist. The simulation results for several typical nonlinear systems are given to demonstrate the correctness and effectiveness of the approach pro-posed.