A device for catching mosquitoes and flies includes: a cavity containing a chamber containing an air inlet and an air outlet； a fan for powering a power source, the fan device is located in the cavity and approaches the The air outlet end； a screen, installed in the chamber and located on the air inlet side of the fan； at least one gate, installed in the air inlet end of the chamber, usually completely close the air inlet； if so, make When the fan is driven and operated so that each grille door opens the air inlet of the chamber, mosquitoes can be sucked into the chamber, and when each grille door closes the air inlet again, the captured Mosquitoes are concentrated between the screen and the gate.一種捕蚊蠅裝置，係包括：一腔體，含有一腔室，該腔室含有一進氣口及一出氣口；一風扇，為一電源供電，該風扇裝置於該腔室內並趨近該出氣口端；一遮網，裝置於該腔室內且位於該風扇的進氣側；至少一柵門，裝置於該腔室之進氣口端，平時完全遮閉該進氣口；如是，令驅動該風扇運轉並操作地使各該柵門敞開該腔室的進氣口時，便可將蚊蠅吸入腔室中，當各該柵門重新封閉該進氣口時便可將所捕捉的蚊蠅集中在該遮網與該柵門間。
