The invention relates to an injurious insect automatic induction detection system and belongs to the injurious insect monitoring field. The system is mainly composed of a current induction device, a motor driving operation device, a circuit adjusting device, a cyclic cleaning device, an error elimination device, a signal recognition device, a data statistics output device and a human body safety current-limiting device. The injurious insect automatic induction detection system is characterized in that the system carries out target object recognition and counting through comparing the current induction values of different substances with the induction set values of target objects. The system has the advantages of high sensitivity in automatic induction, accurate data statistics, firm structure, stable performance and high applicability to field, and can satisfy actual needs of injurious insect monitoring and facilitate the launch of injurious insect prevention and control.