diff --git a/apps/as/src/entities/fnrs-cnsltn/index.ts b/apps/as/src/entities/fnrs-cnsltn/index.ts
index 31bc2f528..176101dbe 100644
--- a/apps/as/src/entities/fnrs-cnsltn/index.ts
+++ b/apps/as/src/entities/fnrs-cnsltn/index.ts
@@ -40,6 +40,7 @@ export type {
   FnrsCnsltnSplmntDmndItem,
   FnrsCnsltnSplmntDmndResponseDto,
   FnrsSharItem,
+  RagIndexingInfoDto,
 } from "./model/fnrs-cnsltn-interface";
 export type {
   EnvoActnReviewReqDto,
diff --git a/apps/as/src/entities/fnrs-cnsltn/model/fnrs-cnsltn-interface.ts b/apps/as/src/entities/fnrs-cnsltn/model/fnrs-cnsltn-interface.ts
index 8e50d5d79..2165ff49e 100644
--- a/apps/as/src/entities/fnrs-cnsltn/model/fnrs-cnsltn-interface.ts
+++ b/apps/as/src/entities/fnrs-cnsltn/model/fnrs-cnsltn-interface.ts
@@ -151,6 +151,14 @@ export type FnrsCnsltnSplmntDmndResponseDto = FnrsCnsltnSplmntDmndItem &
     fnrsCnsltnDocNo?: string;
   };
 
+/** 백엔드 RagIndexingInfoDto */
+export interface RagIndexingInfoDto {
+  isInProgress: boolean;
+  elapsedSeconds?: number;
+  estimatedRemainingSeconds?: number;
+  message?: string;
+}
+
 /** 백엔드 FnrsCnsltnMngDetResponseDto */
 export type FnrsCnsltnMngDetResponseDto = PbadmsMngDetResponseBase<
   FnrsCnsltnMngResponseDto,
@@ -159,6 +167,7 @@ export type FnrsCnsltnMngDetResponseDto = PbadmsMngDetResponseBase<
 > & {
   fnrsSharList?: FnrsSharBizCstTreeDto[];
   sharAtchFileList?: AtflMngClientResponseDto[];
+  ragIndexingInfo?: RagIndexingInfoDto | null;
 };
 
 /** 백엔드 FnrsCnsltnApplySaveRequestDto */
diff --git a/apps/as/src/pages/fnrs-cnsltn/lib/ai-pending-utils.ts b/apps/as/src/pages/fnrs-cnsltn/lib/ai-pending-utils.ts
index 1ac079216..99b1b29ab 100644
--- a/apps/as/src/pages/fnrs-cnsltn/lib/ai-pending-utils.ts
+++ b/apps/as/src/pages/fnrs-cnsltn/lib/ai-pending-utils.ts
@@ -1,3 +1,5 @@
+import type { RagIndexingInfoDto } from "@/entities/fnrs-cnsltn";
+
 const AI_PENDING_STATUS_CODES = ["FV", "AC", "AV"] as const;
 
 type AiPendingStatusCode = (typeof AI_PENDING_STATUS_CODES)[number];
@@ -17,5 +19,17 @@ function getAiPendingMessage(prgrsSttsComCd: string): string {
   return AI_PENDING_MESSAGES[prgrsSttsComCd as AiPendingStatusCode];
 }
 
-export { AI_PENDING_STATUS_CODES, getAiPendingMessage, isAiPendingStatus };
+function isRagIndexingInProgress(
+  prgrsSttsComCd: string,
+  ragIndexingInfo?: RagIndexingInfoDto | null,
+): boolean {
+  return prgrsSttsComCd === "ER" && ragIndexingInfo?.isInProgress === true;
+}
+
+export {
+  AI_PENDING_STATUS_CODES,
+  getAiPendingMessage,
+  isAiPendingStatus,
+  isRagIndexingInProgress,
+};
 export type { AiPendingStatusCode };
diff --git a/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx b/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx
index b3d59f79c..f23e4c521 100644
--- a/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx
+++ b/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx
@@ -41,6 +41,7 @@ import {
 import { SplmntDmndDialog, type SplmntDmndDialogConfirmPayload } from "@/widgets/pbadms-sprt";
 import { Button } from "@common/components";
 
+import { isRagIndexingInProgress } from "../../lib/ai-pending-utils";
 import {
   FNRS_CNSLTN_VIEW_BUTTON_ACTION,
   type FnrsCnsltnViewButtonAction,
@@ -627,16 +628,17 @@ function FloatingActionButtons({
                   파일 보완 요청
                 </Button>
               )}
-              {shouldShowButton(FNRS_CNSLTN_VIEW_BUTTON_ACTION.dsgntRvwr) && (
-                <Button
-                  onClick={() =>
-                    setActiveDialog(prgrsSttsComCd === "EV" ? "elaprDocPrgrs" : "elaprTmplt")
-                  }
-                  disabled={isProcessing}
-                >
-                  검토자 지정
-                </Button>
-              )}
+              {shouldShowButton(FNRS_CNSLTN_VIEW_BUTTON_ACTION.dsgntRvwr) &&
+                !isRagIndexingInProgress(prgrsSttsComCd, data.ragIndexingInfo) && (
+                  <Button
+                    onClick={() =>
+                      setActiveDialog(prgrsSttsComCd === "EV" ? "elaprDocPrgrs" : "elaprTmplt")
+                    }
+                    disabled={isProcessing}
+                  >
+                    검토자 지정
+                  </Button>
+                )}
               {shouldShowButton(FNRS_CNSLTN_VIEW_BUTTON_ACTION.actnCmptn) && (
                 <Button color="green" onClick={handleActnCmptnClick} disabled={isProcessing}>
                   조치 완료
diff --git a/apps/as/src/pages/fnrs-cnsltn/ui/fnrs-view-page.tsx b/apps/as/src/pages/fnrs-cnsltn/ui/fnrs-view-page.tsx
index 2e85018b0..e0b0bb323 100644
--- a/apps/as/src/pages/fnrs-cnsltn/ui/fnrs-view-page.tsx
+++ b/apps/as/src/pages/fnrs-cnsltn/ui/fnrs-view-page.tsx
@@ -14,7 +14,7 @@ import {
 } from "@/widgets/pbadms-sprt";
 import { Skeleton } from "@common/components";
 
-import { getAiPendingMessage, isAiPendingStatus } from "../lib/ai-pending-utils";
+import { getAiPendingMessage, isAiPendingStatus, isRagIndexingInProgress } from "../lib/ai-pending-utils";
 import { needsRoleUser01AtrzResolve } from "../lib/button-config";
 import { getEditableReviewStep } from "../lib/review-step-utils";
 import { EMPTY_CKLST_RESULT_LIST, useChecklistFormState } from "../lib/use-checklist-form-state";
@@ -95,20 +95,25 @@ function FnrsViewPage({ id }: FnrsViewPageProps) {
     detDto.prgrsSttsComCd || "",
   );
   const isAiPending = isAiPendingStatus(detDto.prgrsSttsComCd || "");
+  const isRagIndexing = isRagIndexingInProgress(detDto.prgrsSttsComCd || "", data.ragIndexingInfo);
+  const showPendingBanner = isAiPending || isRagIndexing;
+  const pendingMessage = isRagIndexing
+    ? (data.ragIndexingInfo?.message ?? "")
+    : getAiPendingMessage(detDto.prgrsSttsComCd || "");
 
   return (
     <div className="mt-4">
       <SectionCollapsibleGroup>
         <div className="sticky top-[6rem] z-30 flex items-center gap-4 bg-container px-4 py-2">
           <SectionCollapsibleToggle />
-          {isAiPending && (
+          {showPendingBanner && (
             <div className="flex items-center gap-2">
               <span className="relative flex size-3">
                 <span className="absolute inline-flex h-full w-full animate-ping rounded-full bg-primary opacity-75"></span>
                 <span className="relative inline-flex size-3 rounded-full bg-primary"></span>
               </span>
               <TextShimmer active className="text-xl">
-                {getAiPendingMessage(detDto.prgrsSttsComCd || "")}
+                {pendingMessage}
               </TextShimmer>
             </div>
           )}