diff --git a/Diary/Controller/CreateDiaryViewController.swift b/Diary/Controller/CreateDiaryViewController.swift
index ac7962d76..f9d00c0b6 100644
--- a/Diary/Controller/CreateDiaryViewController.swift
+++ b/Diary/Controller/CreateDiaryViewController.swift
@@ -16,12 +16,23 @@ final class CreateDiaryViewController: UIViewController {
         return textView
     }()
     
+    weak var delegate: DiaryListDelegate?
+    private let container = CoreDataManager.shared.persistentContainer
+    var diary: Diary?
+    
     override func viewDidLoad() {
         super.viewDidLoad()
+        createDiary()
         configureUI()
         setupNotification()
     }
     
+    override func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+        saveDiary()
+        delegate?.readCoreData()
+    }
+    
     private func configureUI() {
         view.backgroundColor = .systemBackground
         self.title = DateFormatter().formatToString(from: Date(), with: "YYYY년 MM월 dd일")
@@ -51,15 +62,37 @@ final class CreateDiaryViewController: UIViewController {
     
     @objc private func keyboardWillShow(_ notification: Notification) {
         guard let keyboardFrame = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey]
-                as? CGRect else {
-            return
-        }
+                as? CGRect else { return }
         
         textView.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: keyboardFrame.size.height, right: 0)
     }
     
     @objc private func keyboardWillHide(_ notification: Notification) {
         textView.contentInset = .zero
+        saveDiary()
+    }
+    
+    private func createDiary() {
+        let newDiary = Diary(context: container.viewContext)
+        newDiary.id = UUID()
+        newDiary.createdAt = Date()
+        
+        diary = newDiary
+    }
+    
+    private func saveDiary() {
+        let contents = textView.text.split(separator: "\n")
+        guard !contents.isEmpty,
+              let title = contents.first else { return }
+        
+        let body = contents.dropFirst().joined(separator: "\n")
+        
+        guard let diary else { return }
+        
+        diary.title = "\(title)"
+        diary.body = body
+        
+        CoreDataManager.shared.saveContext()
     }
     
     deinit {
diff --git a/Diary/Controller/DiaryListViewController.swift b/Diary/Controller/DiaryListViewController.swift
index 6f6b8c530..417f24691 100644
--- a/Diary/Controller/DiaryListViewController.swift
+++ b/Diary/Controller/DiaryListViewController.swift
@@ -6,6 +6,10 @@
 
 import UIKit
 
+protocol DiaryListDelegate: AnyObject {
+    func readCoreData()
+}
+
 final class DiaryListViewController: UIViewController {
     private let tableView: UITableView = {
         let tableView = UITableView()
@@ -13,15 +17,14 @@ final class DiaryListViewController: UIViewController {
         
         return tableView
     }()
-    private var diaryEntities = [DiaryEntity]()
+    
     private let dateFormatter = DateFormatter()
-    private let container = CoreDataManager.shard.persistentContainer
+    private let container = CoreDataManager.shared.persistentContainer
     private var diaryList = [Diary]()
     
     override func viewDidLoad() {
         super.viewDidLoad()
-        
-        setupData()
+
         readCoreData()
         configureUI()
         setupTableView()
@@ -34,6 +37,7 @@ final class DiaryListViewController: UIViewController {
         let addDiary = UIAction(image: UIImage(systemName: "plus")) { [weak self] _ in
             guard let self else { return }
             let createDiaryView = CreateDiaryViewController()
+            createDiaryView.delegate = self
             self.navigationController?.pushViewController(createDiaryView, animated: true)
         }
         
@@ -54,28 +58,6 @@ final class DiaryListViewController: UIViewController {
         tableView.delegate = self
         tableView.register(DiaryListTableViewCell.self, forCellReuseIdentifier: DiaryListTableViewCell.identifier)
     }
-    
-    private func setupData() {
-        do {
-            let loadDiaryEntity: [DiaryEntity] = try DecodingManager.decodeJson(from: "sample")
-            diaryEntities = loadDiaryEntity
-        } catch DecodingError.fileNotFound {
-            print(DecodingError.fileNotFound.message)
-        } catch DecodingError.decodingFailure {
-            print(DecodingError.decodingFailure.message)
-        } catch {
-            print(DecodingError.unknown.message)
-        }
-    }
-    
-    private func readCoreData() {
-        do {
-            let diaryList = try container.viewContext.fetch(Diary.fetchRequest())
-            tableView.reloadData()
-        } catch {
-            // TODO : AlertController Error
-        }
-    }
 }
 
 extension DiaryListViewController: UITableViewDataSource, UITableViewDelegate {
@@ -103,3 +85,14 @@ extension DiaryListViewController: UITableViewDataSource, UITableViewDelegate {
         tableView.deselectRow(at: indexPath, animated: true)
     }
 }
+
+extension DiaryListViewController: DiaryListDelegate {
+    func readCoreData() {
+        do {
+            diaryList = try container.viewContext.fetch(Diary.fetchRequest())
+            tableView.reloadData()
+        } catch {
+            // TODO : AlertController Error
+        }
+    }
+}
diff --git a/Diary/DataManager/CoreDataManager.swift b/Diary/DataManager/CoreDataManager.swift
index 20020d2fe..c50dccd95 100644
--- a/Diary/DataManager/CoreDataManager.swift
+++ b/Diary/DataManager/CoreDataManager.swift
@@ -9,7 +9,7 @@ import Foundation
 import CoreData
 
 class CoreDataManager {
-    static let shard = CoreDataManager()
+    static let shared = CoreDataManager()
     private init() {}
     
     // MARK: - Core Data stack