The invention relates to a method and a system for element layout detection, which are applied to wiring software for a printed circuit board. The printed circuit board is provided in a laying way with at least one first welding pad and one second welding pad which are respectively supplied for being connected with a punctured element and a piece component in a corresponding way. Process capacityparameters of the printed circuit board are set in advance, a height dimension attribute of the piece component is connected with the second welding pad in the corresponding way, and coordinate position attributes of the first welding pad and the second welding pad are collected when the second welding pad laid in a preset distance range away from the first welding pad is detected, and next, a safety distance between the first welding pad and the second welding pad is calculated according to the height dimension attribute, the coordinate position attributes and a preset calculation processingrule. An actual distance between the first welding pad and the second welding pad is calculated according to the coordinate position attributes of the first welding pad and the second welding pad, and then whether the actual distance is less than the safety distance is determined. If the actual distance is less than the safety distance, an indication operation is provided to supply for subsequently regulating the distance between the second welding pad and the first welding pad, thereby the yield rate of the printed circuit board is enhanced.