Abstract: Disclosed herein are a weapon management system using a cop's black-box which collects environment information by sensing an aiming movement of a user to a subject according to use of a weapon from a first cop's black-box, and receives, from a plurality of second cop's black-boxes located within a preset radial distance from the user, external environment information based on the aiming movement of the user, a cop's black-box, and a method for the same. Use of the weapon may be monitored in real time using collected environment information and external environment information such that a further action can be taken.