The present invention provides an insect-trapping device, which comprises at least one fluorescent lamp, at least one electrified net, a translucent body, a power supply equipment, at least one mercury lamp, and a water tank. At least one electrified net is configured on the periphery of at least one fluorescent lamp, and comprising a shielding plate and at least one height adjustment mechanism. The translucent body is configured between at least one fluorescent lamp and at least one electrified net, and surrounds at least one fluorescent lamp, and has a first interval from at least one fluorescent lamp, and has a second interval from at least one electrified net, wherein a part of the light from at least one fluorescent lamp is shielded by the translucent body and aggregated within the range surrounded by the translucent body. The power supply equipment is respectively in electrical connection with at least one electrified net and at least one fluorescent lamp, and comprises a power source and a transformer. The power source and the transformer are electrically connected to each other. At least one mercury lamp is configured above at least one fluorescent lamp, and comprises at least one height adjustment mechanism. The water tank is configured below at least one electrified net.一種捕蟲裝置包含至少一日光燈,至少一電網,部分透光體,供電設備,至少一水銀燈,與水槽。至少一電網設置於至少一日光燈週邊,並包含遮板與至少一高度調整機構。部分透光體設置於至少一日光燈與至少一電網之間,並圍繞至少一日光燈,且與至少一日光燈具有一第一間隔距離,以及與至少一電網具有一第二間隔距離,其中至少一日光燈之一部分光線被部分透光體遮蔽而匯聚在部分透光體所圍繞的範圍內。供電設備分別電性連接至少一電網與至少一日光燈,並包含電源與變壓器。電源與變壓器彼此電性連接。至少一水銀燈設置高於至少一日光燈,並包含至少一高度調整機構。水槽設置於至少一電網下方。100‧‧‧捕蟲裝置120‧‧‧日光燈130‧‧‧電網132‧‧‧遮板135‧‧‧高度調整機構140‧‧‧部分透光體150‧‧‧供電設備152‧‧‧電源154‧‧‧變壓器170‧‧‧水槽180‧‧‧輪子A‧‧‧線段d1‧‧‧第一間隔距離d2‧‧‧第二間隔距離
