Electromagnetic crane is evolved from bridge double girder crane, with detachable electromagnetic chuck and configure the corresponding operating system to control the electromagnetic chuck handling and lifting metal objects. Especially suitable for indoor or outdoor between fixed cross handling or transporting metal products and materials with permeability for, such as ingots, structural steel, iron, scrap iron, scrap steel and other materials. Electromagnetic crane working level is for heavy duty system (A6). Operating environment is the same with double girder overhead crane. When there is main and auxiliary hook, it can also be designed with main hook electromagnetic or auxiliary hook electromagnetic.