diff --git a/IMEI_SN_INDEX.xlsx b/IMEI_SN_INDEX.xlsx
new file mode 100644
index 0000000..feb1ed8
Binary files /dev/null and b/IMEI_SN_INDEX.xlsx differ
diff --git a/src/services/config_service.rs b/src/services/config_service.rs
index 1d647d4..0ac9747 100644
--- a/src/services/config_service.rs
+++ b/src/services/config_service.rs
@@ -1,13 +1,19 @@
+use std::fs;
 use anyhow::Result;
 use crate::models::config_model::ConfigModel;
 
 pub(crate) struct ConfigService;
 
 impl ConfigService {
-    pub fn save_config(model: ConfigModel) -> Result<()> {
-        todo!()
+    pub fn save_config(model: ConfigModel) ->Result<()> {
+        let json = serde_json::to_string(&model)?;
+        fs::write("config.json", json)?;
+        Ok(())
     }
+
     pub fn load_config() -> Result<ConfigModel> {
-        todo!()
+        let json = fs::read_to_string("config.json")?;
+        let model: ConfigModel = serde_json::from_str(&json)?;
+        Ok(model)
     }
 }
\ No newline at end of file
diff --git a/src/services/ui_service.rs b/src/services/ui_service.rs
index 91e87fa..752c49b 100644
--- a/src/services/ui_service.rs
+++ b/src/services/ui_service.rs
@@ -1,4 +1,5 @@
 use std::cell::RefCell;
+use std::process;
 use std::rc::Rc;
 use std::sync::{Arc, Mutex};
 use fltk::prelude::{DisplayExt, InputExt, WidgetBase, WidgetExt};
@@ -17,8 +18,36 @@ pub(crate) struct UiService {
 
 impl UiService {
     pub(crate) fn new() -> Self {
+        // Create the Rc<RefCell<>> instances
         let ui = Rc::new(RefCell::new(main_ui::UserInterface::make_window()));
-        UiService { ui, work_service: Rc::new(RefCell::new(WorkService::new())), current_com: "".to_string() }
+        let work_service_rc = Rc::new(RefCell::new(WorkService::new()));
+
+        // Clone the Rc<RefCell<>> to avoid moving them
+        let work_service_clone = Rc::clone(&work_service_rc);
+        let current_com;
+        let should_current_line;
+
+        {
+            let mut work_service = work_service_clone.borrow_mut();
+            current_com = work_service.config_model.last_com.clone();
+            should_current_line = work_service.config_model.current_line;
+        }
+
+        if work_service_rc.borrow().config_model.excel_path != "" {
+            ui.borrow_mut().excel_file_textbox.set_value(&work_service_rc.borrow().config_model.excel_path);
+            ui.borrow_mut().current_line_textbox.set_value(&work_service_rc.borrow().config_model.current_line.to_string());
+            ui.borrow_mut().com_textbox.set_value(&*current_com.clone());
+
+            work_service_rc.borrow_mut().excel_service.as_mut().unwrap().set_current_line(should_current_line).unwrap();
+        }
+
+        let ui_service = UiService {
+            ui,
+            work_service: work_service_rc,
+            current_com
+        };
+
+        ui_service
     }
 
     pub(crate) fn init_components(&mut self) {
@@ -26,14 +55,17 @@ impl UiService {
         self.init_start_btn();
         self.init_set_line_btn();
         self.init_log();
+        self.init_exit_callback()
     }
 
     fn init_exit_callback(&mut self){
         let ui_rc = Rc::clone(&self.ui);
+        let ui_rc_clone = Rc::clone(&ui_rc);
         let work_service_rc = Rc::clone(&self.work_service);
         ui_rc.borrow_mut().main_window.set_callback(move |_|{
             let mut work_service = work_service_rc.borrow_mut();
             work_service.save_config();
+            process::exit(0);
         });
     }
 
@@ -123,8 +155,10 @@ impl UiService {
             dialog.show();
             let binding = dialog.filename();
             let path = binding.to_str().unwrap();
-            let current_line = &work_service.get_current_line().to_string();
             work_service.init_excel_service(path.to_string()).unwrap();
+            let current_line = &work_service.get_current_line().to_string();
+            work_service.config_model.excel_path = path.to_string();
+            work_service.config_model.current_line = current_line.parse::<usize>().unwrap();
             ui.excel_file_textbox.set_value(path);
             ui.current_line_textbox.set_value(current_line);
         });
diff --git a/src/services/work_service.rs b/src/services/work_service.rs
index b1bf5fa..d7c31f4 100644
--- a/src/services/work_service.rs
+++ b/src/services/work_service.rs
@@ -45,14 +45,21 @@ impl WorkService {
     pub fn write_and_check(&mut self, model: WorkModel) -> Result<bool, String> {
         let msg = &format!("{}:{}:{}", model.imei, model.sn, model.line_number);
         log::info!("Write Start");
-        log::info!("Check Imei From DB");
         match self.sqlite_service.check_imei_has_insert(&model.imei) {
             Ok(true) => {
-                log::error!("Imei Exist");
+                log::error!("Imei Exist: {}", model.imei);
                 self.serial_service = None;
                 return Err("Imei Exist".to_string());
             }
-            _ => {}
+            _ => {log::info!("Check Imei From Db Pass")}
+        }
+        match self.sqlite_service.check_sn_has_insert(&model.sn) {
+            Ok(true) => {
+                log::error!("Imei Exist: {}", model.sn);
+                self.serial_service = None;
+                return Err("Imei Exist".to_string());
+            }
+            _ => {log::info!("Check Sn From Db Pass")}
         }
         if let Err(msg) = self.write_imei(model.imei.clone()) {
             log::error!("Write Imei Error:{}", msg);
@@ -63,6 +70,7 @@ impl WorkService {
             log::error!("Write Sn Error:{}", msg);
             return Err(msg);
         }
+        log::info!("Write Imei:{}", model.sn);
         log::info!("Write End");
         log::info!("Check Start");
         if let Err(msg) = self.check_imei(&model.imei) {
@@ -74,6 +82,7 @@ impl WorkService {
             log::error!("Check Sn Error:{}", msg);
             return Err(msg);
         }
+        log::info!("Check Sn:{}", model.sn);
         log::info!("Check End");
         self.serial_service = None;
         match self.sqlite_service.insert(model) {