Electron　transport　characteristics　through　a　two-dimensional　quantum　dot　array　are　studied　using　the　non-equilibrium　Green＇s　function.　As　the　structure　size　of　the　two-dimensional　quantum　dot　array　changes,　abundant　meaningful　electron　transport　properties　are　obtained.　For　a　two-dimensional　four-quantum-dot　structure,　an　antiresonance　point　gradually　evolves　into　an　antiresonance　band　with　the　increase　of　the　dot-lead　coupling　strength.　An　antiresonance　band　emerges　in　the　conductance　spectrum　as　the　energy　levels　of　quantum　dots　in　upper　and　lower　quantum　dot　arrays　are　different　and　small.　In　contrast,　the　antiresonance　band　evolves　into　a　resonance　band　as　the　difference　between　the　energy　levels　of　quantum　dots　is　large.　Based　on　this　property,　the　system　can　be　designed　as　an　efficient　quantum　switch.　Moreover,　typical　Fano　resonances　may　be　observed　in　the　two-dimensional　quantum　dot　array.　It　is　expected　that　these　findings　will　contribute　to　the　design　of　quantum　devices.