I will discuss the existence of strikingly identical paradigm applicable to both cuprates and iron-based superconductors in understanding magnetism, superconductivity and the interplay between the two: the existence of short range antieferromagnetic exchange couplings and the matching between pairing form factors in reciprocal space and Fermi surface topology are two key ingredients in achieving high superconducting transition temperature. I will show that curpates, ferropnictides and ferrochalcogenides are three examples favoring such a paradigm. I will also discuss experimental results that supporting the prediction and make new suggestions about distinguishing mechanisms based on strong coupling approaches from weak coupling approaches. Finally, I will show such a paradigm can guide us to search for new high temperature superconductors.