This paper mainly described the work of Superconducting Magnet Engineering Center (SMEC), Institute of High Energy Physics (IHEP), Beijing, and its future development directions. During the last several years, the SMEC has successfully developed three big superconducting magnets, 1.0 T Beijing Spectrometer III (BESIII) Magnet, 3.0 T Superconducting Electromagnetic Iron Separator (SEIS) and 1.5 T Magnetic Resonance Image (MRI). And, there are some other Superconducting (SC) magnets under construction. With the help of SEIS magnet, arsenic magnetic separation experiments and turbid wastewater treatment experiments were carried out at IHEP.