Abstract: Due to many electronic equipments loaded on the limited space on ship, it is always the study foci that shipelectromagnetic integral simulation field has two characters, complex technology and many subjects cross. In this paper, westarted from electromagnetic character of ship, reviewed its research field, technical characteristic, prediction simulation methodand improvement. In addition, combined with the tide of development of navy equipment, difficulty and foci technical problemsabout ship on sea in future were presented.