An insect trapping system for canopy layer includes a flight device, a net cover, a hanging assembly, and a trapping device. The net cover, with a top portion thereof connected to the flight device, is provided with an accommodating space opening downward. A remote device remotely controls the flying direction of the flight device and controls the net cover to detach from the flight device. The hanging assembly is longitudinally deposed in the accommodating space. The trapping device, connected to one end of the hanging assembly, contains alcohol and has an opening. Thus, upon flying above the opening or flying into the trapping device, insect is poisoned by alcohol and faints to fall in the trapping device.本發明提供一種用於樹冠層之昆蟲採集系統,其包含:一飛行裝置,其可受一遠端裝置遙控飛行;一網罩,其圍設一呈向下開放狀之容置空間,且網罩之頂部係連接於飛行裝置,並可受遠端裝置控制相對飛行裝置脫離;一吊掛組件,其縱向地固定於容置空間內緣;以及一採集裝置,其固定於吊掛組件之端部,且採集裝置內裝有一酒精,並具有一開口,以令飛至開口上方或飛入採集裝置內之昆蟲,其被酒精毒暈後可掉入採集裝置內。100‧‧‧昆蟲採集系統10‧‧‧飛行裝置11‧‧‧鉤部20‧‧‧網罩21‧‧‧容置空間22‧‧‧頂部23‧‧‧掛環30‧‧‧吊掛組件40‧‧‧採集裝置