diff --git a/src/app/api/qna/save/route.ts b/src/app/api/qna/save/route.ts
index 05d0595..85fbc6f 100644
--- a/src/app/api/qna/save/route.ts
+++ b/src/app/api/qna/save/route.ts
@@ -7,6 +7,7 @@ import { getIronSession } from 'iron-session'
 import { SessionData } from '@/types/Auth'
 import { sessionOptions } from '@/libs/session'
 import { cookies } from 'next/headers'
+import { ERROR_MESSAGE } from '@/hooks/useAlertMsg'
 
 /**
  * @api {POST} /api/qna/save 문의 저장 API
@@ -37,7 +38,7 @@ async function setQna(request: Request): Promise<NextResponse> {
   const formData = await request.formData()
   const mailResult = await service.sendMail(formData)
   if (mailResult instanceof ApiError) {
-    return NextResponse.json({ error: mailResult.message }, { status: mailResult.statusCode })
+    return NextResponse.json({ error: ERROR_MESSAGE.EMAIL_SEND_ERROR }, { status: HttpStatusCode.InternalServerError })
   }
 
   const result = await service.tryFunction(() =>
diff --git a/src/app/api/qna/service.ts b/src/app/api/qna/service.ts
index be3d538..5558a1e 100644
--- a/src/app/api/qna/service.ts
+++ b/src/app/api/qna/service.ts
@@ -35,6 +35,9 @@ export class QnaService {
       if (shouldThrowResult) return response
       return this.handleResult(response)
     } catch (error) {
+      if (shouldThrowResult) {
+        return new ApiError(HttpStatusCode.InternalServerError, ERROR_MESSAGE.SERVER_ERROR)
+      }
       return this.handleRouteError(error)
     }
   }
diff --git a/src/components/inquiry/RegistForm.tsx b/src/components/inquiry/RegistForm.tsx
index 1624822..f448aa3 100644
--- a/src/components/inquiry/RegistForm.tsx
+++ b/src/components/inquiry/RegistForm.tsx
@@ -5,7 +5,7 @@ import { useSessionStore } from '@/store/session'
 import { InquiryRequest } from '@/types/Inquiry'
 import { useEffect, useState } from 'react'
 import { useRouter } from 'next/navigation'
-import { CONFIRM_MESSAGE, ERROR_MESSAGE, SUCCESS_MESSAGE, useAlertMsg, WARNING_MESSAGE } from '@/hooks/useAlertMsg'
+import { CONFIRM_MESSAGE, SUCCESS_MESSAGE, useAlertMsg, WARNING_MESSAGE } from '@/hooks/useAlertMsg'
 import { useInquiryFilterStore } from '@/store/inquiryFilterStore'
 
 export default function RegistForm() {
@@ -106,12 +106,10 @@ export default function RegistForm() {
     showConfirm(
       CONFIRM_MESSAGE.SAVE_INQUIRY_CONFIRM,
       async () => {
-        try {
-          const res = await saveInquiry(formData)
+        const res = await saveInquiry(formData)
+        if (!isSavingInquiry) {
           showSuccessAlert(SUCCESS_MESSAGE.SAVE_SUCCESS)
           router.push(`/inquiry/${res.qnaNo}`)
-        } catch (error) {
-          showErrorAlert(ERROR_MESSAGE.SERVER_ERROR)
         }
       },
       () => null,
diff --git a/src/components/popup/SurveySaleSubmitPopup.tsx b/src/components/popup/SurveySaleSubmitPopup.tsx
index 2093c38..db5cbe3 100644
--- a/src/components/popup/SurveySaleSubmitPopup.tsx
+++ b/src/components/popup/SurveySaleSubmitPopup.tsx
@@ -19,6 +19,7 @@ interface SubmitFormData {
   reference: string[] | null
   title: string
   contents: string | null
+  srlNo: string | null
 }
 
 interface FormField {
@@ -35,7 +36,7 @@ export default function SurveySaleSubmitPopup() {
 
   const { setIsShow } = useSpinnerStore()
   const { getCommCode } = useCommCode()
-  const { surveyDetail, getSubmitTarget } = useSurvey(Number(routeId))
+  const { surveyDetail, getSubmitTarget, isSubmittingSurvey, submitSurvey } = useSurvey(Number(routeId))
   const { showErrorAlert, showSuccessAlert, showConfirm } = useAlertMsg()
 
   const [submitData, setSubmitData] = useState<SubmitFormData>({
@@ -47,6 +48,7 @@ export default function SurveySaleSubmitPopup() {
     reference: null,
     title: '',
     contents: '',
+    srlNo: null,
   })
 
   const [commCodeList, setCommCodeList] = useState<CommCode[]>([])
@@ -56,6 +58,7 @@ export default function SurveySaleSubmitPopup() {
     const baseUpdate = {
       sender: session?.email ?? '',
       title: '[HANASYS現地調査] 調査物件が提出. (' + surveyDetail?.srlNo + ')',
+      srlNo: surveyDetail?.srlNo ?? null,
     }
     /** Admin 제출 폼 데이터 삽입 - 1차 판매점*/
     if (session?.role === 'Admin') {
@@ -106,8 +109,6 @@ export default function SurveySaleSubmitPopup() {
     { id: 'contents', name: '内容', required: false },
   ]
 
-  const { submitSurvey, isSubmittingSurvey } = useSurvey(Number(routeId))
-
   const handleInputChange = (field: keyof SubmitFormData, value: string) => {
     setSubmitData((prev) => ({ ...prev, [field]: value }))
   }
@@ -140,11 +141,15 @@ export default function SurveySaleSubmitPopup() {
           cc: submitData.reference ?? '',
           subject: submitData.title,
           content: generateEmailContent(),
+          surveyPdf: {
+            id: surveyDetail?.id ?? 0,
+            filename: surveyDetail?.srlNo ?? 'hanasys_survey',
+          },
         })
           .then(() => {
+            submitSurvey({ targetId: submitData.targetId, targetNm: submitData.targetNm })
             if (!isSubmittingSurvey) {
               showSuccessAlert(SUCCESS_MESSAGE.SUBMIT_SUCCESS)
-              submitSurvey({ targetId: submitData.targetId, targetNm: submitData.targetNm })
               popupController.setSurveySaleSubmitPopup(false)
             }
           })
diff --git a/src/components/survey-sale/detail/ButtonForm.tsx b/src/components/survey-sale/detail/ButtonForm.tsx
index b52e071..d7063da 100644
--- a/src/components/survey-sale/detail/ButtonForm.tsx
+++ b/src/components/survey-sale/detail/ButtonForm.tsx
@@ -48,10 +48,12 @@ export default function ButtonForm({ mode, setMode, data }: ButtonFormProps) {
 
   const isSubmit = data.basic.submissionStatus
 
-  const { deleteSurvey, updateSurvey, isDeletingSurvey, isUpdatingSurvey } = useSurvey(id)
+  const { deleteSurvey, updateSurvey, isDeletingSurvey, isUpdatingSurvey, isSubmittingSurvey, isLoadingSurveyDetail } = useSurvey(id)
   const { validateSurveyDetail, createSurvey, isCreatingSurvey } = useSurvey()
   const { showErrorAlert, showSuccessAlert, showConfirm } = useAlertMsg()
 
+  const buttonDisabled = isLoadingSurveyDetail || isSubmittingSurvey || isCreatingSurvey || isUpdatingSurvey || isDeletingSurvey
+
   useEffect(() => {
     if (!session?.isLoggedIn) return
 
@@ -237,9 +239,9 @@ export default function ButtonForm({ mode, setMode, data }: ButtonFormProps) {
         <div className="sale-form-btn-wrap">
           <div className="btn-flex-wrap">
             <ListButton />
-            {(permissions.isWriter || permissions.isSubmiter || (permissions.isReceiver && isSubmit)) && <EditButton setMode={setMode} />}
-            {(permissions.isWriter || (permissions.isReceiver && isSubmit)) && <DeleteButton handleDelete={handleDelete} />}
-            {!isSubmit && permissions.isSubmiter && <SubmitButton handleSubmit={handleSubmit} />}
+            {(permissions.isWriter || permissions.isSubmiter || (permissions.isReceiver && isSubmit)) && <EditButton setMode={setMode} disabled={buttonDisabled} />}
+            {(permissions.isWriter || (permissions.isReceiver && isSubmit)) && <DeleteButton handleDelete={handleDelete} disabled={buttonDisabled} />}
+            {!isSubmit && permissions.isSubmiter && <SubmitButton handleSubmit={handleSubmit} disabled={buttonDisabled} />}
           </div>
         </div>
       )}
@@ -252,9 +254,9 @@ export default function ButtonForm({ mode, setMode, data }: ButtonFormProps) {
         <div className="sale-form-btn-wrap">
           <div className="btn-flex-wrap">
             <ListButton />
-            <TempButton handleSave={() => handleSave(true, false)} />
-            <SaveButton handleSave={() => handleSave(false, false)} />
-            {!isSubmit && permissions.isSubmiter && <SubmitButton handleSubmit={handleSubmit} />}
+            <TempButton handleSave={() => handleSave(true, false)} disabled={buttonDisabled} />
+            <SaveButton handleSave={() => handleSave(false, false)} disabled={buttonDisabled} />
+            {!isSubmit && permissions.isSubmiter && <SubmitButton handleSubmit={handleSubmit} disabled={buttonDisabled} />}
           </div>
         </div>
       )}
@@ -274,7 +276,7 @@ const ListButton = () => {
   )
 }
 
-const EditButton = ({ setMode }: { setMode: (mode: Mode) => void }) => {
+const EditButton = ({ setMode, disabled }: { setMode: (mode: Mode) => void; disabled: boolean }) => {
   return (
     <div className="btn-bx">
       <button
@@ -282,6 +284,7 @@ const EditButton = ({ setMode }: { setMode: (mode: Mode) => void }) => {
         onClick={() => {
           setMode('EDIT')
         }}
+        disabled={disabled}
       >
         修正<i className="btn-arr"></i>
       </button>
@@ -289,33 +292,33 @@ const EditButton = ({ setMode }: { setMode: (mode: Mode) => void }) => {
   )
 }
 
-const SubmitButton = ({ handleSubmit }: { handleSubmit: () => void }) => (
+const SubmitButton = ({ handleSubmit, disabled }: { handleSubmit: () => void; disabled: boolean }) => (
   <div className="btn-bx">
-    <button className="btn-frame red icon" onClick={handleSubmit}>
+    <button className="btn-frame red icon" onClick={handleSubmit} disabled={disabled}>
       提出<i className="btn-arr"></i>
     </button>
   </div>
 )
 
-const DeleteButton = ({ handleDelete }: { handleDelete: () => void }) => (
+const DeleteButton = ({ handleDelete, disabled }: { handleDelete: () => void; disabled: boolean }) => (
   <div className="btn-bx">
-    <button className="btn-frame n-blue icon" onClick={handleDelete}>
+    <button className="btn-frame n-blue icon" onClick={handleDelete} disabled={disabled}>
       削除<i className="btn-arr"></i>
     </button>
   </div>
 )
 
-const SaveButton = ({ handleSave }: { handleSave: () => void }) => (
+const SaveButton = ({ handleSave, disabled }: { handleSave: () => void; disabled: boolean }) => (
   <div className="btn-bx">
-    <button className="btn-frame n-blue icon" onClick={handleSave}>
+    <button className="btn-frame n-blue icon" onClick={handleSave} disabled={disabled}>
       保存<i className="btn-arr"></i>
     </button>
   </div>
 )
 
-const TempButton = ({ handleSave }: { handleSave: () => void }) => (
+const TempButton = ({ handleSave, disabled }: { handleSave: () => void; disabled: boolean }) => (
   <div className="btn-bx">
-    <button className="btn-frame n-blue icon" onClick={handleSave}>
+    <button className="btn-frame n-blue icon" onClick={handleSave} disabled={disabled}>
       一時保存<i className="btn-arr"></i>
     </button>
   </div>
diff --git a/src/hooks/useInquiry.ts b/src/hooks/useInquiry.ts
index 50b309e..614376d 100644
--- a/src/hooks/useInquiry.ts
+++ b/src/hooks/useInquiry.ts
@@ -5,7 +5,7 @@ import { useInquiryFilterStore } from '@/store/inquiryFilterStore'
 import { useMemo } from 'react'
 import { useRouter } from 'next/navigation'
 import { useAlertMsg } from '@/hooks/useAlertMsg'
-import { CommCode } from '@/types/CommCode'
+
 
 /**
  * @description 문의사항 관련 기능을 제공하는 커스텀 훅
diff --git a/src/libs/mailer.ts b/src/libs/mailer.ts
index 727e7a3..10baec3 100644
--- a/src/libs/mailer.ts
+++ b/src/libs/mailer.ts
@@ -3,6 +3,15 @@
 import nodemailer from 'nodemailer'
 import { Attachment } from 'nodemailer/lib/mailer'
 
+/**
+ * @description 이메일 파라미터 인터페이스
+ * @param {string} from 발신자
+ * @param {string | string[]} to 수신자
+ * @param {string | string[]} cc 참조
+ * @param {string} subject 제목
+ * @param {string} content 내용
+ * @param {Attachment[]} attachments 첨부파일
+ */
 interface EmailParams {
   from: string
   to: string | string[]
@@ -10,10 +19,32 @@ interface EmailParams {
   subject: string
   content: string
   attachments?: Attachment[]
+  surveyPdf?: {
+    id: number
+    filename: string
+  }
 }
 
-export async function sendEmail({ from, to, cc, subject, content, attachments }: EmailParams): Promise<void> {
-  // Create a transporter using SMTP
+export async function sendEmail({ from, to, cc, subject, content, attachments, surveyPdf }: EmailParams): Promise<void> {
+  /**
+   * @description 조사매물 pdf blob 및 buffer 생성
+   */
+  let surveyPdfBuffer: Buffer | null = null
+  if (surveyPdf) {
+    const resp = await fetch(`${process.env.NEXT_PUBLIC_API_URL}/api/survey-sales/${surveyPdf.id}?isPdf=true`, {
+      method: 'GET',
+      headers: {
+        'Content-Type': 'application/pdf',
+      },
+    })
+    const pdfBlob = await resp.blob()
+    surveyPdfBuffer = Buffer.from(await pdfBlob.arrayBuffer())
+  }
+  const surveyPdfAttachment = surveyPdfBuffer ? [{ filename: '[HANASYS現地調査]' + surveyPdf?.filename + '.pdf', content: surveyPdfBuffer }] : []
+
+  /**
+   * @description SMTP 트랜스포터 생성
+   */
   const transporter = nodemailer.createTransport({
     host: process.env.SMTP_HOST,
     port: Number(process.env.SMTP_PORT),
@@ -22,21 +53,17 @@ export async function sendEmail({ from, to, cc, subject, content, attachments }:
     tls: { rejectUnauthorized: false },
   })
 
-  // Email options
+  /**
+   * @description 이메일 옵션
+   */
   const mailOptions = {
     from,
     to: Array.isArray(to) ? to.join(', ') : to,
     cc: cc ? (Array.isArray(cc) ? cc.join(', ') : cc) : undefined,
     subject,
     html: content,
-    attachments: attachments || [],
+    attachments: surveyPdf ? surveyPdfAttachment : attachments || [],
   }
 
-  try {
-    // Send email
-    await transporter.sendMail(mailOptions)
-  } catch (error) {
-    console.error('Error sending email:', error)
-    throw new Error('Failed to send email')
-  }
+  await transporter.sendMail(mailOptions)
 }