Environment early warning device and control method thereof

The invention discloses an environment early warning device and a control method thereof, and relates to the technical field of environment early warning devices. The device comprises an outer protection box; the alarm is movably mounted on the outer protection box through the outer protection box opening; the magnetic assembly comprises an electromagnet and an iron block, the electromagnet and the iron block are installed on the outer protection box and the alarm respectively, the current position of the alarm is locked through the magnetic assembly, and the magnetic assembly is electrically connected with the control panel; and the two protective covers are symmetrically and slidably mounted on the outer protective box, the movement path of the protective covers is perpendicular to the movement path of the alarm, and the protective covers are linked with the alarm through a linkage assembly. Compared with the prior art, under the cooperation of the protection piece, the alarm can be rapidly pulled into the