The present invention relates to a device for calculating engagement possibilities and engagement adequacy between distributed weapon systems so as to recommend an engagement combination (weapon-target combination) for inducing an optimal engagement effect from among various kinds of distributed and arranged weapons within a short time. The device comprises: a weapon information managing unit for collecting and cataloging weapon information; an available weapon selecting unit for selecting an available weapon by combining an equipment state, a boarding state, and a standby state; an engagement rule managing unit for managing engagement rules and collecting engagement control situation information to activate needed engagement rules; an engagement adequacy evaluating unit for selecting an engagement object target from a threat-evaluated target list and the activated engagement rules; an engagement opportunity analyzing unit for discerning an engagement opportunity by analyzing a route of a target and a range of a weapon; and a weapon assignment calculator for recommending the most proper one from among possible combinations.
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