Method and a system for inserting electronic components. The system is composed of an electronic-component inserting machine for inserting electronic components to a printed circuit board and an electronic-component supplying machine, which comprises a plurality of cartridges, being two kinds according to the radial and axial type of the electronic components, for containing each kind of electronic components, detachably attached to a table. The method and system are characterized in being capable of supplying components free-selectively, of radial and axial type and of different lead wire gage, in a desired order, regardless of arbitrary supply arrangement of electronic components, with a single system. While the electronic components of desired type and gage are inserted, the then non-desired type and gage of electronic components are automatically suspended from being supplied in the same system.