In　recent　years,　the　magnetotelluric　(MT)　method　develops　rapidly.　The　MT　instruments　are　almost　monopolized　by　several　big　geophysical　companies　from　the　United　States,　Canada　and　Germany,　and　China　has　imported　nearly　500　sets　of　these　devices.　With　increasing　of　national　strength,　electromagnetic　exploration　system　development　independently　is　on　the　agenda.　In　the　year　of　2010,　the　Institute　of　Geology　and　Geophysics,　Chinese　Academy　of　Sciences,　took　on　one　subject　of　the　SinoProbe　project,　the　research　of　surface　Electromagnetic　Prospecting　(SEP)　system,　and　has　obtained　some　achievements.　This　article　presents　in　detail　research　of　the　SEP　system,　such　as　objectives　and　the　overall　design　of　the　SEP　system,　the　transmitter,　the　receiver,　the　coil　and　the　software　of　the　system,　as　well　as　test　results　in　the　field.　Finally,　this　paper　makes　discussions,　summary　and　outlook　of　this　system.