Electrical cabinet with detection device

An electrical cabinet with a detection device comprises a cabinet body, a heat dissipation device, a temperature measurement device and a dust removal mechanism. The cabinet body comprises a cabinet top plate, a cabinet bottom plate, a left cabinet plate, a right cabinet plate, a front cabinet plate and a rear cabinet plate, and an accommodating cavity is defined by the cabinet top plate, the cabinet bottom plate, the left cabinet plate and the right cabinet plate. A first dovetail groove is formed in the bottom surface of the cabinet top plate, a heat dissipation device is arranged in the first dovetail groove, and the heat dissipation device can move back and forth along the trend of the first dovetail groove; a plurality of movable through grooves are formed in the rear cabinet plate, temperature measuring devices are arranged in the movable through grooves, and the temperature measuring devices can move back and forth in the moving directions of the movable through grooves; the temperature measuring devic