To meet the needs of electromagnetic method,which is used for large depth and multi-parameter survey in perdu resources exploration,audio magnetotelluric method(AMT) and it's feature of larger depth,controlled source induced polarization(IP) and it's multi-parameter feature are both utilized. On the basis of developing distributed receiving system & high power transmitter,and data processing & interpretation technology,the array system for natural source electromagnetic method and the system for multi-source electromagnetic method have been developed. Experiments and applications on orefields manifest: (a) Arrayed audio magnetotelluric system has the following advantages,e.g.,portability,high efficiency and large surveying depth,it is suitable to do survey in many different landforms,especially for large depth survey in difficult conditions and perdu resources exploration. (b) Integrated multi-source electromagnetic system has many advantages,not only can it obtain resistivity information of natural source in large depth,but also can obtain IP information. The integrated system can be used in metal ore resource,underground water resource,oil & gas resource exploration widely.