The invention discloses an insect trapping system. The system comprises an electric power facility, a modulatable ultrasonic wave emitting module, a visible light trapping device, a high-temperature killing device and an insect collecting device; the modulatable ultrasonic wave emitting module is mounted outside the electric power facility and used for generating ultrasonic waves to repel insects;the visible light trapping device is mounted in the electric power facility and used for generating light waves with certain wavelength to attract the insects; the high-temperature killing device isused for killing the insects attracted by the visible light trapping device at the high temperature; the insect collecting device is used for collecting the insects killed at the high temperature. Through the technical scheme, the effectiveness and the practicability can be kept for a long time, so that the phenomenon that the electric power facility is damaged due to insect activities is reduced,the accident occurrence probability is reduced, and the stability and safety of running of the electric power facility are improved.