The utility model discloses a wireless three -dimensional magnetic survey volume device of electromagnetic field that charges, include: host computer, three axial displacement platforms, magnetic field probe, triaxial rotary platform, the triaxial rotary platform be located three axial displacement platforms, magnetic field probe sets up on triaxial rotary platform, PC control triaxial rotary platform with the action of three axial displacement platforms. Set up induction coil in magnetic field probe's the probe, including three coil, x, y, the z axle direction of the perpendicular same coordinate system of difference to the initial point that uses this coordinate system is center, quadrature each other. The utility model discloses can realize that the not equidirectional magnetic field intensity of each position department measures to the accurate measurement goes out in the electromagnetic environment space according to the magnetic field intensity of all directions, judges whether wireless charging system accords with electromagnetism safety standard and space electromagnetism safety protection, and is also applicable in the electromagnetic measurement of the various wireless environment that charge.