Construction site environment air quality detection device and alarm system

The invention discloses a construction site environment air quality detection device and an alarm system, and particularly relates to the technical field of environment detection equipment.The construction site environment air quality detection device comprises a movable bottom frame, a supporting frame and a control box, and the supporting frame and the control box are arranged on the bottom frame; a monitoring camera and a display screen are arranged on the two sides of the top of the supporting frame correspondingly, a mounting box with an opening in one side is further mounted on one side of the top of the supporting frame, and a dust removing mechanism is arranged on the mounting box; through the arrangement of the ash removal mechanism, the surface of the display screen can be cleaned, so that ash removal of the display screen is realized, the definition of the display screen can be ensured, detection data can be conveniently displayed, a constructor can conveniently watch the display screen, the displa