This invention is one kind of high electromagnetism endures the electromagnetism accommodating test with the small photomounting, is installs a camera, the electro-optic signal shifter and a rechargeable battery in an electric conduction shell interior, when the power source opens, the rechargeable battery is provides the work power source to give the camera, but can carry on the phantom photography work, this obtain the phantom material is transforms by the electro-optic signal shifter after the light signal, by way of an optical fiber wire transmission to exterior, takes advantage of this, this equipment is the electric conduction material which does not have other to appear externally, therefore not test system electromagnetic wave disturbance, but can pick up the surveillance picture clearly, and also does not have the influence to be able to test electromagnetism of wave radiation the accurate.