In this paper. we show the relationship between (skew) deductive system and (skew) filter in residuated skew lattices. It is shown that if a residuated skew lattice is conormal. then any skew deductive system is a skew filter under a condition and deductive system and skew deductive system are equivalent under some conditions too. https://macorners.shop/product-category/engraved-40oz-tumbler/