A　thin,　clean　pristine　Au　film　created　in　a　transmission　electron　microscope　chamber　was　tailored　by　an　electron　beam.　Various　kinds　of　nanopatterns,　including　hexagonal　holes　and　dumbbell-like　patterns,　were　fabricated　by　different　doses　of　the　electron　beam.　A　high-quality　series　of　in　situ　images　were　recorded　to　explore　the　irradiation　mechanism.　The　electron-matter　collision　enabled　the　electron　beam　to　act　as　a　tweezer　to　arrange　atoms　into　a　specified　pattern.