Numerical simulation of a right-hand cavity moving law was performed through the solution 2D N-S equations and energy equation by using the PISO algorithm and RNG based κ-ε turbulence model. The simulation results reveal the airflow is asymmetry because the right airflow velocity of jet nozzle are more than the left airflow veloctity. The streamwise velocity off center peaks near the impinging surfaces, the Nusselt number off center peaks near the impinging surfaces. The Nusselt number take on up-down tendency as the nozzle-to-plate distance is increased. The cooling effect for Z/do=20～30 mm is more than the others. The Nu distribution along the wall is influenced mainly by the interaction of produced vortex ring and wall boundary layer.