Industrial control cabinet active purification and dust removal device and method

The invention discloses an industrial control cabinet active purification and dust removal device and a method, the device comprises a fixed plate, a dedusting structure and a filtering structure, thefixed plate is fixed at the side edge of a cabinet body, a heat dissipation window is arranged at one side of the cabinet body far away from the fixed plate, and the dedusting structure comprises a fan; a dust sensor is fixed to the inner side of the cabinet body above the fixed plate, a single-chip microcomputer is fixed to the cabinet body below the dust sensor, the dust degree in the cabinet body is detected through the dust sensor, then the dust in the cabinet body is cleaned through the fan, and the problem that workers need to detect the dust in advance when the cabinet body is cleanedis solved. The workload of workers is reduced, the practicability of the dust removal device is improved, air entering the cabinet body is filtered through a filter plate, dust and other impurities are prevented from being dri