Laser alarm and method

The invention relates to a laser alarm device and method, and relates to the field of laser alarm devices, and the laser alarm device comprises a plurality of modularized alarm detection heads, a host, and a switching controller. The plurality of modular alarm detection heads are arranged on a protection target in a combined manner; each modular alarm detection head is connected with the switching controller; the switching controller is connected with the host; the switching controller is used for carrying out inclination compensation on the electric pulse signal detected by the modular alarm detection head and sending the electric pulse signal subjected to inclination compensation to the host; and the host is used for carrying out fusion processing according to the electric pulse signal after inclination compensation, and determining the position information of an incoming attack organ so as to realize alarm of incoming attack laser. According to the invention, all-around protection early warning can be carr