The essential characteristic of electromagnet from what Angle to analyze

Electromagnet you must don't strange. We are used to living in many places the magnet, but electromagnet you outline will have some strange, but believe that everyone in high school of time certainly learn life induction here! Is through some kind of device? Can we may realize the conversion between electricity and magnetism, electromagnet and we are trying to say is a kind of device can perhaps converts electrical energy into magnetic energy of a device.