diff --git a/hwe/sammo/API/InheritAction/CalcResetTurnTimeRange.php b/hwe/sammo/API/InheritAction/CalcResetTurnTimeRange.php
new file mode 100644
index 00000000..7a11804c
--- /dev/null
+++ b/hwe/sammo/API/InheritAction/CalcResetTurnTimeRange.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace sammo\API\InheritAction;
+
+use DateTimeImmutable;
+use sammo\Session;
+use DateTimeInterface;
+use sammo\DB;
+use sammo\Enums\APIRecoveryType;
+use sammo\Enums\RankColumn;
+use sammo\GameConst;
+use sammo\General;
+use sammo\KVStorage;
+use sammo\LiteHashDRBG;
+use sammo\RandUtil;
+use sammo\TimeUtil;
+use sammo\UniqueConst;
+use sammo\UserLogger;
+use sammo\Util;
+
+class CalcResetTurnTimeRange extends \sammo\BaseAPI
+{
+    public function validateArgs(): ?string
+    {
+        return null;
+    }
+
+    public function getRequiredSessionMode(): int
+    {
+        return static::REQ_GAME_LOGIN | static::REQ_READ_ONLY;
+    }
+
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag): null | string | array | APIRecoveryType
+    {
+        $userID = $session->userID;
+        $generalID = $session->generalID;
+
+        $general = General::createObjFromDB($generalID);
+        if ($userID != $general->getVar('owner')) {
+            return '로그인 상태가 이상합니다. 다시 로그인해 주세요.';
+        }
+
+        $db = DB::db();
+
+        $gameStor = KVStorage::getStorage($db, 'game_env');
+        [$turnTerm, $serverTurnTime] = $gameStor->getValuesAsArray(['turnterm', 'turntime']);
+
+        $currTurnTime = new DateTimeImmutable($general->getTurnTime());
+        $serverTurnTimeObj = new DateTimeImmutable($serverTurnTime);
+
+        $minTurnTime = $currTurnTime->add(TimeUtil::secondsToDateInterval($turnTerm * -30));
+        $maxTurnTime = $currTurnTime->add(TimeUtil::secondsToDateInterval($turnTerm * 30));
+
+        $timeDiff = $serverTurnTimeObj->diff($minTurnTime);
+        $timeDiffSec = TimeUtil::DateIntervalToSeconds($timeDiff);
+        if($timeDiffSec > 0){
+            $minTurnTime = $minTurnTime->add(TimeUtil::secondsToDateInterval($timeDiffSec));
+            $maxTurnTime = $maxTurnTime->add(TimeUtil::secondsToDateInterval($timeDiffSec));
+        }
+
+        return [
+            'result' => true,
+            'timeDiffSec' => $timeDiffSec,
+            'minTurnTime' => TimeUtil::format($minTurnTime, false),
+            'maxTurnTime' => TimeUtil::format($maxTurnTime, false),
+        ];
+    }
+}
diff --git a/hwe/ts/PageInheritPoint.vue b/hwe/ts/PageInheritPoint.vue
index 1090432f..ec51f208 100644
--- a/hwe/ts/PageInheritPoint.vue
+++ b/hwe/ts/PageInheritPoint.vue
@@ -107,11 +107,11 @@
         <div class="col col-lg-4 col-sm-6 col-12 py-2">
           <div class="row px-4">
             <div class="a-right col-6 align-self-center">랜덤 턴 초기화</div>
-            <BButton class="col-6" variant="primary" @click="buySimple('ResetTurnTime')"> 구입 </BButton>
+            <BButton class="col-6" variant="primary" @click="tryResestTurnTime()"> 구입 </BButton>
           </div>
           <div class="a-right">
             <small class="form-text text-muted"
-              >다음 턴이 랜덤으로 바뀝니다. (필요 포인트가 피보나치식으로 증가합니다)<br /><span style="color: white"
+              >다음 턴 시간이 앞, 뒤 랜덤하게 바뀝니다. (필요 포인트가 피보나치식으로 증가합니다)<br /><span style="color: white"
                 >필요 포인트: {{ inheritActionCost.resetTurnTime }}</span
               ></small
             >
@@ -234,6 +234,8 @@ declare const staticValues: {
   };
   resetTurnTimeLevel: number;
   resetSpecialWarLevel: number;
+  ternTurm: number;
+  turnTime: string;
 
   availableSpecialWar: Record<
     string,
@@ -263,6 +265,7 @@ import type { inheritBuffType, InheritPointLogItem } from "./defs/API/InheritAct
 import * as JosaUtil from "@/util/JosaUtil";
 import { BButton } from "bootstrap-vue-next";
 import { unwrap } from "./util/unwrap";
+import { add as dateAdd } from 'date-fns';
 
 const inheritanceViewText: Record<InheritanceViewType, { title: string; info: string }> = {
   sum: {
@@ -446,9 +449,42 @@ async function buyInheritBuff(buffKey: inheritBuffType) {
   //TODO: 페이지 새로고침 필요없이 하도록
   location.reload();
 }
-async function buySimple(type: "ResetTurnTime" | "BuyRandomUnique" | "ResetSpecialWar") {
+
+async function tryResestTurnTime(){
+  const cost = inheritActionCost.resetTurnTime;
+
+  if (items.value.previous < cost) {
+    alert("유산 포인트가 부족합니다.");
+    return;
+  }
+
+
+  const { minTurnTime, maxTurnTime } = await SammoAPI.InheritAction.CalcResetTurnTimeRange();
+
+  //YYYY-MM-DD hh:mm:ss 에서 hh:mm:ss 까지만 보여줄 예정
+  const textMinTurnTime = minTurnTime.substring(11, 19);
+  const textMaxTurnTime = maxTurnTime.substring(11, 19);
+
+  const msg = `${cost} 포인트로 턴을 초기화 하시겠습니까?\n${textMinTurnTime} ~ ${textMaxTurnTime} 사이의 시간으로 초기화 됩니다.`;
+  if (!confirm(msg)) {
+    return;
+  }
+
+  try {
+    await SammoAPI.InheritAction.ResetTurnTime();
+  } catch (e) {
+    console.error(e);
+    alert(`실패했습니다: ${e}`);
+    return;
+  }
+
+  alert("성공했습니다.");
+  //TODO: 페이지 새로고침 필요없이 하도록
+  location.reload();
+}
+
+async function buySimple(type: "BuyRandomUnique" | "ResetSpecialWar") {
   const costMap: Record<typeof type, number> = {
-    ResetTurnTime: inheritActionCost.resetTurnTime,
     ResetSpecialWar: inheritActionCost.resetSpecialWar,
     BuyRandomUnique: inheritActionCost.randomUnique,
   };
@@ -459,15 +495,16 @@ async function buySimple(type: "ResetTurnTime" | "BuyRandomUnique" | "ResetSpeci
     return;
   }
 
-  const messageMap: Record<typeof type, string> = {
-    ResetTurnTime: `${cost} 포인트로 턴을 초기화 하시겠습니까?`,
-    ResetSpecialWar: `${cost} 포인트로 전투 특기를 초기화 하시겠습니까?`,
-    BuyRandomUnique: `${cost} 포인트로 랜덤 유니크를 구입하시겠습니까?`,
-  };
   if (items.value.previous < cost) {
     alert("유산 포인트가 부족합니다.");
     return;
   }
+
+  const messageMap: Record<typeof type, string> = {
+    ResetSpecialWar: `${cost} 포인트로 전투 특기를 초기화 하시겠습니까?`,
+    BuyRandomUnique: `${cost} 포인트로 랜덤 유니크를 구입하시겠습니까?`,
+  };
+
   if (!confirm(messageMap[type])) {
     return;
   }
diff --git a/hwe/ts/SammoAPI.ts b/hwe/ts/SammoAPI.ts
index 626f36d9..834eee35 100644
--- a/hwe/ts/SammoAPI.ts
+++ b/hwe/ts/SammoAPI.ts
@@ -174,6 +174,11 @@ const apiRealPath = {
     BuyRandomUnique: PUT as APICallT<undefined>,
     ResetSpecialWar: PUT as APICallT<undefined>,
     ResetTurnTime: PUT as APICallT<undefined>,
+    CalcResetTurnTimeRange: GET as APICallT<undefined, {
+      result: true,
+      minTurnTime: string,
+      maxTurnTime: string,
+    }>,
     SetNextSpecialWar: PUT as APICallT<{
       type: string;
     }>,