Abstract By means of the two-scale convergence method, we investigate the asymptotic behavior of K2 VEGAN eigenvalues and eigenfunctions of Stekloff eigenvalue problems in perforated domains.We prove a concise and precise homogenization result including convergence of gradients of eigenfunctions which improves the understanding Drain Pump Seal of the asymptotic behavior of eigenfunctions.It is also justified that the natural local problem is not an eigenvalue problem.