The　reverse　construction　and　analysis　of　the　networks　of　molecular　interactions　are　essential　for　understanding　their　functions　within　cells.　In　this　paper,　a　logic　network　model　is　constructed　to　investigate　the　complicated　regulation　mechanism　of　shoot　genes　of　Arabidopsis　Thaliana　in　response　to　stimuli.　The　dynamics　of　the　complicated　logic　network　is　analyzed,　discussed　and　simulated.　The　simulating　results　show　that　the　logic　network　of　the　active　genes　of　shoot　eventually　evolves　into　eleven　attractors　under　the　stimuli,　where　including　five　1-　periodic　and　six　2-periodic　attractors.　Our　work　provides　valuable　reference　and　guidance　for　biologists　to　understand　and　explain　Arabidopsis＇　response　to　outside　stimuli　by　experiments.