In this paper we study a predator-prey system. modeling the interaction of two species with diffusion and T-periodic environmental parameters. It is a Leslie-Gower type predator-prey model with Holling-type-II functional response. We establish some sufficient conditions for the ultimate boundedness of solutions and permanence of this system. https://www.countryscenesaddleryandpetsuppliers.shop/product-category/training-aids/