diff --git a/adminfront/src/features/tenants/routes/TenantSchemaPage.tsx b/adminfront/src/features/tenants/routes/TenantSchemaPage.tsx
index f9a8d04a..221c9a90 100644
--- a/adminfront/src/features/tenants/routes/TenantSchemaPage.tsx
+++ b/adminfront/src/features/tenants/routes/TenantSchemaPage.tsx
@@ -17,7 +17,13 @@ import { Label } from "../../../components/ui/label";
 import { fetchMe, fetchTenant, updateTenant } from "../../../lib/adminApi";
 import { t } from "../../../lib/i18n";
 
-type SchemaFieldType = "text" | "number" | "boolean" | "date";
+type SchemaFieldType =
+  | "text"
+  | "number"
+  | "boolean"
+  | "date"
+  | "float"
+  | "datetime";
 
 type SchemaField = {
   id: string;
@@ -27,6 +33,7 @@ type SchemaField = {
   required: boolean;
   adminOnly: boolean;
   validation?: string;
+  unsigned?: boolean;
 };
 
 function createFieldId() {
@@ -98,13 +105,16 @@ export function TenantSchemaPage() {
           type:
             field?.type === "number" ||
             field?.type === "boolean" ||
-            field?.type === "date"
+            field?.type === "date" ||
+            field?.type === "float" ||
+            field?.type === "datetime"
               ? field.type
               : "text",
           required: Boolean(field?.required),
           adminOnly: Boolean(field?.adminOnly),
           validation:
             typeof field?.validation === "string" ? field.validation : "",
+          unsigned: Boolean(field?.unsigned),
         })),
       );
     }
@@ -146,6 +156,7 @@ export function TenantSchemaPage() {
         required: false,
         adminOnly: false,
         validation: "",
+        unsigned: false,
       },
     ]);
   };
@@ -242,9 +253,13 @@ export function TenantSchemaPage() {
                         nextType === "text" ||
                         nextType === "number" ||
                         nextType === "boolean" ||
-                        nextType === "date"
+                        nextType === "date" ||
+                        nextType === "float" ||
+                        nextType === "datetime"
                       ) {
-                        updateField(index, { type: nextType });
+                        updateField(index, {
+                          type: nextType as SchemaFieldType,
+                        });
                       }
                     }}
                   >
@@ -257,7 +272,13 @@ export function TenantSchemaPage() {
                     <option value="number">
                       {t(
                         "ui.admin.tenants.schema.field.type_number",
-                        "숫자 (Number)",
+                        "숫자 (Integer)",
+                      )}
+                    </option>
+                    <option value="float">
+                      {t(
+                        "ui.admin.tenants.schema.field.type_float",
+                        "실수 (Float)",
                       )}
                     </option>
                     <option value="boolean">
@@ -272,12 +293,18 @@ export function TenantSchemaPage() {
                         "날짜 (Date)",
                       )}
                     </option>
+                    <option value="datetime">
+                      {t(
+                        "ui.admin.tenants.schema.field.type_datetime",
+                        "일시 (DateTime)",
+                      )}
+                    </option>
                   </select>
                 </div>
               </div>
 
               <div className="grid grid-cols-1 md:grid-cols-3 gap-4 items-center">
-                <div className="flex items-center gap-6">
+                <div className="flex flex-wrap items-center gap-4">
                   <label className="flex items-center gap-2 cursor-pointer">
                     <input
                       type="checkbox"
@@ -307,6 +334,24 @@ export function TenantSchemaPage() {
                       )}
                     </span>
                   </label>
+                  {(field.type === "number" || field.type === "float") && (
+                    <label className="flex items-center gap-2 cursor-pointer">
+                      <input
+                        type="checkbox"
+                        checked={field.unsigned}
+                        onChange={(e) =>
+                          updateField(index, { unsigned: e.target.checked })
+                        }
+                        className="w-4 h-4 rounded border-gray-300 text-primary focus:ring-primary"
+                      />
+                      <span className="text-sm font-medium">
+                        {t(
+                          "ui.admin.tenants.schema.field.unsigned",
+                          "음수 불가",
+                        )}
+                      </span>
+                    </label>
+                  )}
                 </div>
                 <div className="space-y-2">
                   <Input
diff --git a/adminfront/src/features/users/UserListPage.tsx b/adminfront/src/features/users/UserListPage.tsx
index 18f8bbec..ced361c1 100644
--- a/adminfront/src/features/users/UserListPage.tsx
+++ b/adminfront/src/features/users/UserListPage.tsx
@@ -615,6 +615,9 @@ function UserListPage() {
                 </Button>
                 <UserBulkMoveGroupModal
                   userIds={selectedUserIds}
+                  selectedUsers={items.filter((u) =>
+                    selectedUserIds.includes(u.id),
+                  )}
                   onSuccess={() => {
                     query.refetch();
                     setSelectedUserIds([]);
diff --git a/adminfront/src/features/users/components/UserBulkMoveGroupModal.tsx b/adminfront/src/features/users/components/UserBulkMoveGroupModal.tsx
index ad1c51a1..e0b9f57f 100644
--- a/adminfront/src/features/users/components/UserBulkMoveGroupModal.tsx
+++ b/adminfront/src/features/users/components/UserBulkMoveGroupModal.tsx
@@ -1,6 +1,6 @@
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import type { AxiosError } from "axios";
-import { FolderTree, Loader2, Search } from "lucide-react";
+import { AlertTriangle, FolderTree, Loader2, Search } from "lucide-react";
 import * as React from "react";
 import { toast } from "sonner";
 import { Button } from "../../../components/ui/button";
@@ -18,19 +18,28 @@ import { ScrollArea } from "../../../components/ui/scroll-area";
 import {
   type GroupSummary,
   type TenantSummary,
+  type UserSummary,
   bulkUpdateUsers,
   fetchGroups,
   fetchTenants,
 } from "../../../lib/adminApi";
 import { t } from "../../../lib/i18n";
 
+type UserSchemaField = {
+  key: string;
+  label: string;
+  required?: boolean;
+};
+
 interface UserBulkMoveGroupModalProps {
   userIds: string[];
+  selectedUsers?: UserSummary[];
   onSuccess?: () => void;
 }
 
 export function UserBulkMoveGroupModal({
   userIds,
+  selectedUsers = [],
   onSuccess,
 }: UserBulkMoveGroupModalProps) {
   const [open, setOpen] = React.useState(false);
@@ -38,6 +47,7 @@ export function UserBulkMoveGroupModal({
     React.useState<string>("");
   const [selectedGroupName, setSelectedGroupName] = React.useState<string>("");
   const [searchTerm, setSearchTerm] = React.useState("");
+  const [acknowledgeWarning, setAcknowledgeWarning] = React.useState(false);
 
   const queryClient = useQueryClient();
 
@@ -48,10 +58,11 @@ export function UserBulkMoveGroupModal({
   });
   const tenants = tenantsData?.items ?? [];
 
-  const selectedTenantId = React.useMemo(
-    () => tenants.find((t) => t.slug === selectedTenantSlug)?.id ?? "",
+  const selectedTenant = React.useMemo(
+    () => tenants.find((t) => t.slug === selectedTenantSlug),
     [tenants, selectedTenantSlug],
   );
+  const selectedTenantId = selectedTenant?.id ?? "";
 
   const { data: groups, isLoading: isGroupsLoading } = useQuery({
     queryKey: ["tenant-groups", selectedTenantId],
@@ -59,6 +70,51 @@ export function UserBulkMoveGroupModal({
     enabled: open && !!selectedTenantId,
   });
 
+  const schemaWarnings = React.useMemo(() => {
+    if (!selectedTenant || selectedUsers.length === 0) return null;
+
+    const targetSchema =
+      (selectedTenant.config?.userSchema as UserSchemaField[]) || [];
+    const targetSchemaKeys = new Set(targetSchema.map((f) => f.key));
+    const requiredKeys = targetSchema
+      .filter((f) => f.required)
+      .map((f) => f.key);
+
+    const missingRequiredFields = new Set<string>();
+    const incompatibleFields = new Set<string>();
+
+    for (const user of selectedUsers) {
+      const userMeta = user.metadata || {};
+
+      // 1. Check for missing required fields
+      for (const key of requiredKeys) {
+        if (
+          userMeta[key] === undefined ||
+          userMeta[key] === null ||
+          userMeta[key] === ""
+        ) {
+          missingRequiredFields.add(key);
+        }
+      }
+
+      // 2. Check for fields that exist in user metadata but not in the target schema (data loss)
+      for (const key of Object.keys(userMeta)) {
+        if (!targetSchemaKeys.has(key)) {
+          incompatibleFields.add(key);
+        }
+      }
+    }
+
+    if (missingRequiredFields.size === 0 && incompatibleFields.size === 0) {
+      return null;
+    }
+
+    return {
+      missing: Array.from(missingRequiredFields),
+      incompatible: Array.from(incompatibleFields),
+    };
+  }, [selectedTenant, selectedUsers]);
+
   const mutation = useMutation({
     mutationFn: bulkUpdateUsers,
     onSuccess: () => {
@@ -96,7 +152,18 @@ export function UserBulkMoveGroupModal({
   }, [groups, searchTerm]);
 
   return (
-    <Dialog open={open} onOpenChange={setOpen}>
+    <Dialog
+      open={open}
+      onOpenChange={(val) => {
+        setOpen(val);
+        if (!val) {
+          setSelectedTenantSlug("");
+          setSelectedGroupName("");
+          setAcknowledgeWarning(false);
+          setSearchTerm("");
+        }
+      }}
+    >
       <DialogTrigger asChild>
         <Button
           variant="ghost"
@@ -131,6 +198,7 @@ export function UserBulkMoveGroupModal({
               onChange={(e) => {
                 setSelectedTenantSlug(e.target.value);
                 setSelectedGroupName("");
+                setAcknowledgeWarning(false);
               }}
             >
               <option value="">{t("ui.common.select", "선택하세요...")}</option>
@@ -195,6 +263,49 @@ export function UserBulkMoveGroupModal({
               </ScrollArea>
             </div>
           )}
+
+          {schemaWarnings && (
+            <div className="rounded-lg border border-destructive/20 bg-destructive/10 p-3 space-y-2 mt-4 text-sm">
+              <div className="flex items-center gap-2 text-destructive font-semibold">
+                <AlertTriangle size={16} />
+                {t("ui.admin.users.bulk.schema_warning", "스키마 호환성 경고")}
+              </div>
+              <div className="text-destructive/80 text-xs">
+                {schemaWarnings.missing.length > 0 && (
+                  <p>
+                    {t(
+                      "msg.admin.users.bulk.schema_missing",
+                      "대상 테넌트의 필수 필드가 누락되어 있습니다:",
+                    )}{" "}
+                    <strong>{schemaWarnings.missing.join(", ")}</strong>
+                  </p>
+                )}
+                {schemaWarnings.incompatible.length > 0 && (
+                  <p>
+                    {t(
+                      "msg.admin.users.bulk.schema_incompatible",
+                      "대상 테넌트 스키마에 없는 필드는 유실될 수 있습니다:",
+                    )}{" "}
+                    <strong>{schemaWarnings.incompatible.join(", ")}</strong>
+                  </p>
+                )}
+              </div>
+              <label className="flex items-center gap-2 cursor-pointer mt-2 pt-2 border-t border-destructive/10">
+                <input
+                  type="checkbox"
+                  checked={acknowledgeWarning}
+                  onChange={(e) => setAcknowledgeWarning(e.target.checked)}
+                  className="w-4 h-4 rounded border-gray-300 text-destructive focus:ring-destructive"
+                />
+                <span className="font-medium text-destructive/90">
+                  {t(
+                    "ui.admin.users.bulk.acknowledge_warning",
+                    "경고를 확인했으며 계속 진행합니다.",
+                  )}
+                </span>
+              </label>
+            </div>
+          )}
         </div>
 
         <DialogFooter>
@@ -203,7 +314,11 @@ export function UserBulkMoveGroupModal({
           </Button>
           <Button
             onClick={handleMove}
-            disabled={!selectedTenantSlug || mutation.isPending}
+            disabled={
+              !selectedTenantSlug ||
+              mutation.isPending ||
+              (!!schemaWarnings && !acknowledgeWarning)
+            }
           >
             {mutation.isPending && (
               <Loader2 size={16} className="mr-2 animate-spin" />
diff --git a/backend/internal/handler/user_handler.go b/backend/internal/handler/user_handler.go
index 679046b5..68dfe9bd 100644
--- a/backend/internal/handler/user_handler.go
+++ b/backend/internal/handler/user_handler.go
@@ -13,6 +13,7 @@ import (
 	"net/http"
 	"os"
 	"regexp"
+	"strconv"
 	"strings"
 	"time"
 
@@ -1463,6 +1464,87 @@ func (h *UserHandler) validateMetadataWithAuth(metadata map[string]any, schema [
 			return errors.New("field " + key + " is admin only")
 		}
 
+		// Type validation
+		if expectedType, ok := config["type"].(string); ok && expectedType != "" && val != nil && val != "" {
+			switch expectedType {
+			case "number":
+				var numVal float64
+				switch v := val.(type) {
+				case float64:
+					numVal = v
+				case int:
+					numVal = float64(v)
+				case string:
+					parsed, err := strconv.ParseFloat(v, 64)
+					if err != nil {
+						return errors.New("field " + key + " must be a number")
+					}
+					numVal = parsed
+				default:
+					return errors.New("field " + key + " must be a number")
+				}
+				if float64(int(numVal)) != numVal {
+					return errors.New("field " + key + " must be an integer")
+				}
+				if unsigned, ok := config["unsigned"].(bool); ok && unsigned && numVal < 0 {
+					return errors.New("field " + key + " must be an unsigned integer")
+				}
+			case "float":
+				var numVal float64
+				switch v := val.(type) {
+				case float64:
+					numVal = v
+				case int:
+					numVal = float64(v)
+				case string:
+					parsed, err := strconv.ParseFloat(v, 64)
+					if err != nil {
+						return errors.New("field " + key + " must be a float")
+					}
+					numVal = parsed
+				default:
+					return errors.New("field " + key + " must be a float")
+				}
+				if unsigned, ok := config["unsigned"].(bool); ok && unsigned && numVal < 0 {
+					return errors.New("field " + key + " must be an unsigned float")
+				}
+			case "boolean":
+				switch v := val.(type) {
+				case bool:
+					// ok
+				case string:
+					if v != "true" && v != "false" {
+						return errors.New("field " + key + " must be a boolean")
+					}
+				default:
+					return errors.New("field " + key + " must be a boolean")
+				}
+			case "date":
+				if strVal, ok := val.(string); ok {
+					if _, err := time.Parse("2006-01-02", strVal); err != nil {
+						return errors.New("field " + key + " must be a valid date (YYYY-MM-DD)")
+					}
+				} else {
+					return errors.New("field " + key + " must be a date string")
+				}
+			case "datetime":
+				if strVal, ok := val.(string); ok {
+					_, err1 := time.Parse(time.RFC3339, strVal)
+					_, err2 := time.Parse("2006-01-02T15:04", strVal)
+					_, err3 := time.Parse("2006-01-02T15:04:05", strVal)
+					if err1 != nil && err2 != nil && err3 != nil {
+						return errors.New("field " + key + " must be a valid datetime")
+					}
+				} else {
+					return errors.New("field " + key + " must be a datetime string")
+				}
+			case "text":
+				if _, ok := val.(string); !ok {
+					return errors.New("field " + key + " must be a string")
+				}
+			}
+		}
+
 		// Regex validation
 		if regexStr, ok := config["validation"].(string); ok && regexStr != "" {
 			strVal := ""