The invention discloses an EMC two-dimensional scanning imaging system used for a printed circuit board. The system includes an upper computer and a mechanical scanning system electrically connected with the upper computer, the upper computer is used for sending a motion control instruction and a frequency sweep instruction to the mechanical scanning system, receiving field intensity data transmitted by the mechanical scanning system, and generating a scanned image; the mechanical scanning system includes a motion control unit, a field intensity probe and a spectrometer; the mechanical control unit is used for receiving the motion control instruction of the upper computer and driving the field intensity probe to move to a designated position; and the spectrometer is used for receiving the frequency sweep instruction of the upper computer, reading the field intensity data of the field intensity probe, and uploading to the upper computer. The EMC two-dimensional scanning imaging system used for the printed circuit board can accurately locate an interference source of radiation and assess key IC electromagnetic compatibility, solve the problem of electromagnetic compatibility fundamentally, improve the production efficiency and percent of pass of products, and reduce the cost.