Experiments and finite element analysis of shot peen forming of wing skin panels integrated with stringers showed that the radius of panels deformed by peening could be expressed as a function of thickness and shot peening intensity. We verified that panels could be deformed into a saddle shape or twist by shot peening both sides of the panel at the same intensity, elongating it. Simulation of deformation by shot peening was based on thermal stress analysis using the finite element method. Unexpected waving of the panel edge could be well simulated and prevented based on simulation.