Abstract: Superconductivity and ferromagnetic long-range ordering are two antagonistic states of matter. It is a long-standing intriguing issue to explore the coexistence of the two phenomena. In this paper we will first overview the main progress in this field over the past half century. Then we report our recent achievements in the discovery and development of ferromagnetic superconductors in iron pnictides. Finally, we summarize by giving some prospects for future research on this new type of material.