diff --git a/packages/common/business_components/src/ui/sdmInsertForm/form.tsx b/packages/common/business_components/src/ui/sdmInsertForm/form.tsx
index c5c9ef809..9da949bee 100644
--- a/packages/common/business_components/src/ui/sdmInsertForm/form.tsx
+++ b/packages/common/business_components/src/ui/sdmInsertForm/form.tsx
@@ -4,7 +4,6 @@ import React, { useCallback, useEffect, useState } from "react";
 import type { ControllerRenderProps, UseFormReturn } from "react-hook-form";
 import { FormField } from "../form";
 import { FormUi } from "../form_ui";
-import { SelectBox } from "../select";
 import { SdmSearchForm } from "./sdmNameBox";
 import { SearchAddressModal } from "../search_address/SearchAddressModal";
 
@@ -80,6 +79,11 @@ type FieldComponent = (
   field: ControllerRenderProps<FormSchema, keyof FormSchema>,
 ) => React.ReactElement;
 
+const getReadonlyInputClassName = (isReadonly?: boolean) =>
+  isReadonly
+    ? "!text-xl text-gray-600 bg-gray-100 cursor-default"
+    : "!text-xl text-gray-600";
+
 export function SdmRegForm({
   form,
   onCheckboxChange,
@@ -92,11 +96,6 @@ export function SdmRegForm({
   readOnly,
   openNetwork,
 }: SdmRegFormProps) {
-  const [sidoValue, setSidoValue] = useState<string>("");
-  const [sigunValue, setSigunValue] = useState<string>("");
-  const [filteredSigunData, setFilteredSigunData] = useState<SelectDataType[]>([
-    { text: "전체", val: "0" },
-  ]);
   const [isBznmTotNoDisabled, setIsBznmTotNoDisabled] = useState(true);
   const [orgBznmNo, setOrgBznmNo] = useState<string>("");
   const [updateCoNm, setUpdateNm] = useState<string>("");
@@ -134,46 +133,12 @@ export function SdmRegForm({
   const initializeSigunData = useCallback(
     (sidoCd: string) => {
       if (sidoCd === "0") {
-        setSigunValue("0");
-        setFilteredSigunData([{ text: "전체", val: "0" }]);
+        form.setValue("sggCd", "");
       } else {
-        const newFilteredData = [
-          { text: "전체", val: "0" },
-          ...selectSigunData.filter(
-            (item: SelectDataType) => item.val.substring(0, 2) === sidoCd,
-          ),
-        ];
-        setSigunValue("0");
-        setFilteredSigunData(newFilteredData);
+        form.setValue("sggCd", "");
       }
     },
-    [selectSigunData],
-  );
-
-  const onSelectValue = useCallback(
-    (
-      val: string,
-      type: string,
-      field: ControllerRenderProps<FormSchema, keyof FormSchema> | undefined,
-    ) => {
-      if (!updateList?.dmdInfoId)
-        switch (type) {
-          case "ctpvCd":
-            initializeSigunData(val);
-            setSidoValue(val);
-            field?.onChange(val);
-            form.setValue("dmdInfoId", "");
-            form.setValue("bznmTotNo", "");
-            break;
-          case "sggCd":
-            setSigunValue(val);
-            field?.onChange(val);
-            form.setValue("dmdInfoId", "");
-            form.setValue("bznmTotNo", "");
-            break;
-        }
-    },
-    [initializeSigunData, form, updateList],
+    [form],
   );
 
   const handleCheckboxChange = useCallback(
@@ -207,13 +172,11 @@ export function SdmRegForm({
       // 수요처 불러온 후 사업자번호를 바꿀경우를 대비함
       setOrgBznmNo(rtnCompData?.dmdInfoId);
       const sidoCd = rtnCompData?.ctpvCd.trim() || "";
-      setSidoValue(sidoCd);
       form.setValue("ctpvCd", sidoCd);
       initializeSigunData(sidoCd);
 
       setTimeout(() => {
         const sigunCd = rtnCompData?.sggCd.trim() || "";
-        setSigunValue(sigunCd);
         form.setValue("sggCd", sigunCd);
       }, 100);
 
@@ -258,7 +221,6 @@ export function SdmRegForm({
       );
       if (!matchedSido) return;
 
-      setSidoValue(matchedSido.val);
       form.setValue("ctpvCd", matchedSido.val, { shouldValidate: true });
       initializeSigunData(matchedSido.val);
 
@@ -279,7 +241,6 @@ export function SdmRegForm({
 
       if (!matchedSigun) return;
 
-      setSigunValue(matchedSigun.val);
       form.setValue("sggCd", matchedSigun.val, { shouldValidate: true });
     },
     [form, initializeSigunData, selectSidoData, selectSigunData],
@@ -364,68 +325,6 @@ export function SdmRegForm({
     label: string;
     component: FieldComponent;
   }> = [
-      {
-        name: "ctpvCd",
-        label: "시도",
-        component: (field) =>
-          updateList?.dmdInfoId ? (
-            <Input
-              placeholder="시도"
-              type="text"
-              className="!text-xl text-gray-600"
-              onChange={(e) => {
-                field.onChange(e.target.value);
-              }}
-              value={
-                selectSidoData.find((item) => item.val === field.value?.trim())
-                  ?.text ?? ""
-              }
-              readOnly={!!updateList?.dmdInfoId}
-            />
-          ) : (
-            <SelectBox
-              selectClass={undefined}
-              label=""
-              selectArray={selectSidoData}
-              onSelectValue={(val) =>
-                onSelectValue(val.toString(), "ctpvCd", field ?? "")
-              }
-              className=""
-              value={sidoValue}
-            />
-          ),
-      },
-      {
-        name: "sggCd",
-        label: "시군구",
-        component: (field) =>
-          updateList?.dmdInfoId ? (
-            <Input
-              placeholder="시도"
-              type="text"
-              className="!text-xl text-gray-600"
-              onChange={(e) => {
-                field.onChange(e.target.value);
-              }}
-              value={
-                selectSigunData.find((item) => item.val === field.value?.trim())
-                  ?.text ?? ""
-              }
-              readOnly={!!updateList?.dmdInfoId}
-            />
-          ) : (
-            <SelectBox
-              selectClass={"!text-xl text-gray-600"}
-              label=""
-              selectArray={filteredSigunData}
-              onSelectValue={(val) =>
-                onSelectValue(val.toString(), "sggCd", field)
-              }
-              className=""
-              value={sigunValue}
-            />
-          ),
-      },
       {
         name: "dmdCoNm",
         label: "회사명",
@@ -449,7 +348,7 @@ export function SdmRegForm({
           <Input
             placeholder="사업자등록번호를 입력하세요"
             type="text"
-            className="!text-xl text-gray-600"
+            className={getReadonlyInputClassName(!!updateList?.dmdInfoId)}
             onChange={(e) => bznNoChange(e, "dmdInfoId", field)}
             value={formatBusinessNumber(field.value ?? "")}
             readOnly={!!updateList?.dmdInfoId}
@@ -468,7 +367,7 @@ export function SdmRegForm({
             <Input
               placeholder="여러사업장이 있을 경우 입력해주세요"
               type="text"
-              className="!mt-5 !text-xl text-gray-600"
+              className={`${getReadonlyInputClassName(!!updateList?.dmdInfoId)} !mt-5`}
               disabled={isBznmTotNoDisabled}
               onChange={(e) => bznNoChange(e, "bznmTotNo", field)}
               // {...field}
@@ -488,7 +387,7 @@ export function SdmRegForm({
                 {/* 우편번호 */}
                 <Input
                   type="text"
-                  className="!text-xl text-gray-600 w-64"
+                  className={`${getReadonlyInputClassName(true)} w-64`}
                   readOnly={true}
                   value={form.watch("zip") ?? ""}
                   placeholder="우편번호"
@@ -498,7 +397,7 @@ export function SdmRegForm({
               {/* 주소 */}
               <Input
                 type="text"
-                className="!text-xl text-gray-600"
+                className={getReadonlyInputClassName(true)}
                 readOnly={true}
                 value={address ?? ""}
                 placeholder="주소"
@@ -507,7 +406,7 @@ export function SdmRegForm({
               <Input
                 placeholder="상세 주소를 입력하세요"
                 type="text"
-                className="!text-xl text-gray-600"
+                className={getReadonlyInputClassName(readOnly)}
                 readOnly={readOnly}
                 onChange={(e) => {
                   const value = e.target.value;
@@ -521,13 +420,51 @@ export function SdmRegForm({
             <Input
               placeholder="주소를 입력하세요"
               type="text"
-              className="!text-xl text-gray-600"
+              className={getReadonlyInputClassName(readOnly)}
               readOnly={readOnly}
               {...field}
               value={field.value ?? ""}
             />
           ),
       },
+      {
+        name: "ctpvCd",
+        label: "시도",
+        component: (field) => (
+          <Input
+            placeholder="시도"
+            type="text"
+            className={getReadonlyInputClassName(true)}
+            onChange={(e) => {
+              field.onChange(e.target.value);
+            }}
+            value={
+              selectSidoData.find((item) => item.val === field.value?.trim())
+                ?.text ?? ""
+            }
+            readOnly={true}
+          />
+        ),
+      },
+      {
+        name: "sggCd",
+        label: "시군구",
+        component: (field) => (
+          <Input
+            placeholder="시군구"
+            type="text"
+            className={getReadonlyInputClassName(true)}
+            onChange={(e) => {
+              field.onChange(e.target.value);
+            }}
+            value={
+              selectSigunData.find((item) => item.val === field.value?.trim())
+                ?.text ?? ""
+            }
+            readOnly={true}
+          />
+        ),
+      },
       {
         name: "telno",
         label: "전화번호",
@@ -538,7 +475,7 @@ export function SdmRegForm({
             <Input
               placeholder="전화번호를 입력하세요"
               type="text"
-              className="!text-xl text-gray-600"
+              className={getReadonlyInputClassName(readOnly)}
               value={formattedValue}
               readOnly={readOnly}
               onChange={(e) => {
@@ -557,7 +494,7 @@ export function SdmRegForm({
           <Input
             placeholder="패스워드를 입력하세요"
             type="password"
-            className="!text-xl text-gray-600"
+            className={getReadonlyInputClassName(readOnly)}
             readOnly={readOnly}
             {...field}
             value={field.value ?? ""}
@@ -571,7 +508,7 @@ export function SdmRegForm({
           <Input
             placeholder="패스워드를 입력하세요"
             type="password"
-            className="!text-xl text-gray-600"
+            className={getReadonlyInputClassName(readOnly)}
             readOnly={readOnly}
             {...field}
             value={field.value ?? ""}
@@ -595,8 +532,6 @@ export function SdmRegForm({
           const inputId = `${name}-input`;
           const errorId = `${name}-error`;
           const isRequired = [
-            "ctpvCd",
-            "sggCd",
             "dmdCoNm",
             "dmdInfoId",
             "daddr",