Abstract: To accurately evaluate the magnetic properties of spacecraft, a gridded magnetic model of spacecraft is established, and a method for the holographic imaging of the spacecraft’s 3-D magnetic field information is proposed. The magnetic field information of the spacecraft measuring surface is collected and calculated by using the stereo array scanning system, and the horizontal position and the depth of the internal magnetic sources are determined by an integrated consideration of the modulus extremum of the magnetic gradient tensor and the Euler inversion method, so that the magnetic information pertaining to the spacecraft interior, the detecting surface and the ambient space can be analyzed in a visual pattern. A test for the spacecraft model with a grid space of 10 cm is conducted for a single magnetic source and the multi-point sources. It is found that the deviation of the single direction location of the internal magnetic source is less than 0.05 m, while the deviation of the single direction magnetic moment is less than 0.02 A∙m²; the gross errors of the space magnetic field intensity and the magnetic moment for the test article are less than 5%. This method provides a practical means for rapidly obtaining magnetic information of the quasi-rectangular spacecraft.