diff --git a/src/components/production/WorkerScreen/MaterialInputModal.tsx b/src/components/production/WorkerScreen/MaterialInputModal.tsx
index 9240750b..e53f3d15 100644
--- a/src/components/production/WorkerScreen/MaterialInputModal.tsx
+++ b/src/components/production/WorkerScreen/MaterialInputModal.tsx
@@ -14,7 +14,7 @@
  */
 
 import { useState, useEffect, useCallback, useMemo, useRef } from 'react';
-import { Loader2, Check, Zap } from 'lucide-react';
+import { Loader2, Check, Zap, Info } from 'lucide-react';
 import { ContentSkeleton } from '@/components/ui/skeleton';
 import {
   Dialog,
@@ -547,6 +547,47 @@ export function MaterialInputModal({
                             {group.materialCode}
                           </span>
                         )}
+                        {/* 매칭 정보 말풍선 */}
+                        <span className="relative group/info inline-flex">
+                          <Info className={cn(
+                            "h-3.5 w-3.5 cursor-help",
+                            group.lots.some(l => l.stockLotId !== null) ? "text-blue-400" : "text-red-400"
+                          )} />
+                          <span className="absolute left-0 top-5 z-50 hidden group-hover/info:block w-64 p-2.5 rounded-lg shadow-lg border bg-white text-xs text-gray-700 leading-relaxed">
+                            <span className="font-semibold text-gray-900 block mb-1">자재 매칭 정보</span>
+                            <span className="block text-[11px] text-gray-500 mb-1.5">
+                              품목코드: {group.materialCode || '-'}<br/>
+                              규격: {group.lots[0]?.specification || '-'}<br/>
+                              매칭기준: 품목코드 + 규격 일치하는 입고 LOT 검색 (FIFO)
+                            </span>
+                            {(() => {
+                              const availableLots = group.lots.filter(l => l.stockLotId !== null);
+                              const noStockLots = group.lots.filter(l => l.stockLotId === null);
+                              if (availableLots.length > 0) {
+                                return (
+                                  <span className="block">
+                                    <span className="text-emerald-600 font-medium">
+                                      ✓ {availableLots.length}건 매칭 완료
+                                    </span>
+                                    {availableLots.map((l, i) => (
+                                      <span key={i} className="block text-[11px] text-gray-500 ml-2">
+                                        LOT {l.lotNo} | 가용 {formatNumber(l.lotAvailableQty)}{group.unit} | FIFO #{l.fifoRank}
+                                      </span>
+                                    ))}
+                                  </span>
+                                );
+                              }
+                              return (
+                                <span className="block text-red-600 font-medium">
+                                  ✗ 매칭 가능한 입고 LOT 없음
+                                  <span className="block text-[11px] text-red-500 font-normal mt-0.5">
+                                    → [{group.materialCode}] {group.lots[0]?.specification || ''} 자재를 입고해주세요
+                                  </span>
+                                </span>
+                              );
+                            })()}
+                          </span>
+                        </span>
                       </div>
                       <div className="flex items-center gap-2 flex-wrap">
                         <span className="text-xs text-gray-500">