diff --git a/DevLog/Infra/Service/TodoService.swift b/DevLog/Infra/Service/TodoService.swift
index f50b562e..acb4536a 100644
--- a/DevLog/Infra/Service/TodoService.swift
+++ b/DevLog/Infra/Service/TodoService.swift
@@ -146,8 +146,13 @@ final class TodoService {
         let snapshot = try await firestoreQuery.getDocuments()
         let todos = snapshot.documents.compactMap { makeResponse(from: $0) }
 
+        let todoNumber = searchedTodoNumber(from: trimmedKeyword)
         let filtered = todos.filter { todo in
-            todo.title.localizedCaseInsensitiveContains(trimmedKeyword)
+            if let todoNumber, todo.number == todoNumber {
+                return true
+            }
+
+            return todo.title.localizedCaseInsensitiveContains(trimmedKeyword)
                 || todo.content.localizedCaseInsensitiveContains(trimmedKeyword)
                 || todo.tags.contains { $0.localizedCaseInsensitiveContains(trimmedKeyword) }
         }
@@ -483,6 +488,19 @@ private extension TodoService {
         )
     }
 
+    func searchedTodoNumber(from keyword: String) -> Int? {
+        guard keyword.hasPrefix("#") else {
+            return nil
+        }
+
+        let numberText = String(keyword.dropFirst())
+        guard !numberText.isEmpty, numberText.allSatisfy(\.isNumber) else {
+            return nil
+        }
+
+        return Int(numberText)
+    }
+
     enum TodoFieldKey: String {
         case id
         case isPinned
diff --git a/DevLog/Presentation/ViewModel/SearchViewModel.swift b/DevLog/Presentation/ViewModel/SearchViewModel.swift
index 0a8ab7a5..6bfc606b 100644
--- a/DevLog/Presentation/ViewModel/SearchViewModel.swift
+++ b/DevLog/Presentation/ViewModel/SearchViewModel.swift
@@ -107,6 +107,7 @@ final class SearchViewModel: Store {
                 cancelDebounce()
                 state.webPages = []
                 state.todos = []
+                state.isLoading = false
             } else {
                 state.isLoading = true
                 scheduleDebouncedQuery(query)
@@ -136,12 +137,16 @@ final class SearchViewModel: Store {
                 do {
                     send(.setLoading(true))
                     defer { send(.setLoading(false)) }
+                    let searchesTodoOnly = searchesTodoOnly(query)
                     async let todos = fetchTodosUseCase.execute(TodoQuery(keyword: query), cursor: nil)
-                    async let webPages = fetchWebPagesUseCase.execute(query)
+                    async let webPageItems = fetchWebPageItems(
+                        query: query,
+                        searchesTodoOnly: searchesTodoOnly
+                    )
                     let todoItems = try await todos.items.compactMap { TodoListItem(from: $0) }
-                    let webPageItems = try await webPages.map { WebPageItem(from: $0) }
+                    let resolvedWebPageItems = try await webPageItems
                     send(.fetchTodos(todoItems))
-                    send(.fetchWebPage(webPageItems))
+                    send(.fetchWebPage(resolvedWebPageItems))
                 } catch {
                     send(.setAlert(true))
                 }
@@ -177,6 +182,22 @@ private extension SearchViewModel {
         searchDebounceTask = nil
     }
 
+    func searchesTodoOnly(_ query: String) -> Bool {
+        query.trimmingCharacters(in: .whitespacesAndNewlines).hasPrefix("#")
+    }
+
+    func fetchWebPageItems(
+        query: String,
+        searchesTodoOnly: Bool
+    ) async throws -> [WebPageItem] {
+        if searchesTodoOnly {
+            return []
+        }
+
+        let webPages = try await fetchWebPagesUseCase.execute(query)
+        return webPages.map { WebPageItem(from: $0) }
+    }
+
     func saveRecentQueries(_ queries: OrderedSet<String>) {
         updateRecentSearchQueriesUseCase.execute(Array(queries))
     }
diff --git a/DevLog/Resource/Localizable.xcstrings b/DevLog/Resource/Localizable.xcstrings
index 5e533343..4a057543 100644
--- a/DevLog/Resource/Localizable.xcstrings
+++ b/DevLog/Resource/Localizable.xcstrings
@@ -1495,13 +1495,13 @@
         "en" : {
           "stringUnit" : {
             "state" : "translated",
-            "value" : "Search"
+            "value" : "Search (e.g. #123)"
           }
         },
         "ko" : {
           "stringUnit" : {
             "state" : "translated",
-            "value" : "검색"
+            "value" : "검색 (예: #123)"
           }
         }
       }
@@ -2950,13 +2950,13 @@
         "en" : {
           "stringUnit" : {
             "state" : "translated",
-            "value" : "Search %1$@"
+            "value" : "Search %1$@ (e.g. #123)"
           }
         },
         "ko" : {
           "stringUnit" : {
             "state" : "translated",
-            "value" : "%1$@ 검색"
+            "value" : "%1$@ 검색 (예: #123)"
           }
         }
       }
@@ -3367,4 +3367,4 @@
     }
   },
   "version" : "1.0"
-}
\ No newline at end of file
+}
diff --git a/DevLog/UI/Search/SearchView.swift b/DevLog/UI/Search/SearchView.swift
index dec3802b..2c63c3c5 100644
--- a/DevLog/UI/Search/SearchView.swift
+++ b/DevLog/UI/Search/SearchView.swift
@@ -61,9 +61,7 @@ struct SearchView: View {
     @ViewBuilder
     private var searchableContent: some View {
         Group {
-            if viewModel.state.isLoading {
-                LoadingView()
-            } else if viewModel.state.searchQuery.isEmpty {
+            if viewModel.state.searchQuery.isEmpty {
                 if viewModel.state.recentQueries.isEmpty {
                     searchInstruction
                 } else {
@@ -71,6 +69,8 @@ struct SearchView: View {
                         recentQueries
                     }
                 }
+            } else if viewModel.state.isLoading {
+                LoadingView()
             } else if viewModel.state.webPages.isEmpty && viewModel.state.todos.isEmpty {
                 emptySearchResult
             } else {
diff --git a/Firebase/firestore.index.json b/Firebase/firestore.index.json
index 9162f6c2..914b6b4d 100644
--- a/Firebase/firestore.index.json
+++ b/Firebase/firestore.index.json
@@ -32,6 +32,24 @@
         }
       ]
     },
+    {
+      "collectionGroup": "todoLists",
+      "queryScope": "COLLECTION",
+      "fields": [
+        {
+          "fieldPath": "deletedAt",
+          "order": "ASCENDING"
+        },
+        {
+          "fieldPath": "createdAt",
+          "order": "DESCENDING"
+        },
+        {
+          "fieldPath": "__name__",
+          "order": "ASCENDING"
+        }
+      ]
+    },
     {
       "collectionGroup": "todoLists",
       "queryScope": "COLLECTION",