diff --git a/src/structs/cell.rs b/src/structs/cell.rs
index fafea9b8..9e9fb5e5 100644
--- a/src/structs/cell.rs
+++ b/src/structs/cell.rs
@@ -26,19 +26,14 @@ pub struct Cell {
     hyperlink: Option<Hyperlink>,
 }
 impl Cell {
-    pub fn get_cell_value(&self) -> &CellValue {
+    pub(crate) fn get_cell_value(&self) -> &CellValue {
         &self.cell_value
     }
 
-    pub fn get_cell_value_mut(&mut self) -> &mut CellValue {
+    pub(crate) fn get_cell_value_mut(&mut self) -> &mut CellValue {
         &mut self.cell_value
     }
 
-    pub fn set_cell_value(&mut self, value: CellValue) -> &mut Self {
-        self.cell_value = value;
-        self
-    }
-
     pub fn get_style(&self) -> &Style {
         &self.style
     }
diff --git a/src/structs/cell_value.rs b/src/structs/cell_value.rs
index 629478c4..87456e83 100644
--- a/src/structs/cell_value.rs
+++ b/src/structs/cell_value.rs
@@ -6,7 +6,7 @@ use std::borrow::Cow;
 use structs::CellRawValue;
 
 #[derive(Clone, Default, Debug, PartialEq, PartialOrd)]
-pub struct CellValue {
+pub(crate) struct CellValue {
     pub(crate) raw_value: CellRawValue,
     pub(crate) formula: Option<String>,
     pub(crate) formula_attributes: Vec<(String, String)>,
diff --git a/src/structs/spreadsheet.rs b/src/structs/spreadsheet.rs
index c059b566..2383482a 100644
--- a/src/structs/spreadsheet.rs
+++ b/src/structs/spreadsheet.rs
@@ -177,23 +177,6 @@ impl Spreadsheet {
         }
     }
 
-    /// Gets the cell value by specifying an address.
-    /// # Arguments
-    /// * `address` - address. ex) "Sheet1!A1:C5"
-    /// # Return value
-    /// *`Vec<&CellValue>` - CellValue List.
-    /// # Examples
-    /// ```
-    /// let mut book = umya_spreadsheet::new_file();
-    /// let mut cell_value_List = book.get_cell_value_by_address("Sheet1!A1:C5");
-    /// ```
-    pub fn get_cell_value_by_address(&self, address: &str) -> Vec<&CellValue> {
-        let (sheet_name, range) = split_address(address);
-        self.get_sheet_by_name(&sheet_name)
-            .unwrap()
-            .get_cell_value_by_range(&range)
-    }
-
     /// (This method is crate only.)
     /// Gets the cell value by specifying an Address Object.
     /// # Arguments
diff --git a/src/structs/worksheet.rs b/src/structs/worksheet.rs
index d490073c..62f3401a 100644
--- a/src/structs/worksheet.rs
+++ b/src/structs/worksheet.rs
@@ -315,84 +315,6 @@ impl Worksheet {
         self
     }
 
-    /// Get cell value.
-    /// # Arguments
-    /// * `coordinate` - Specify the coordinates. ex) `"A1"` or `(1, 1)`
-    /// # Return value
-    /// * `&CellValue` - CellValue.
-    /// # Examples
-    /// ```
-    /// let book = umya_spreadsheet::new_file();
-    /// let worksheet = book.get_sheet(&0).unwrap();
-    /// let cell_value = worksheet.get_cell_value("A1");
-    /// // or pass in a tuple `(col, row)`, both col and row starting at `1`
-    /// let cell_value = worksheet.get_cell_value((1, 1));
-    /// ```
-    pub fn get_cell_value<T>(&self, coordinate: T) -> &CellValue
-    where
-        T: Into<CellCoordinates>,
-    {
-        let CellCoordinates { col, row } = coordinate.into();
-        self.cell_collection.get_cell_value(&col, &row)
-    }
-
-    /// Gets the cell value by specifying the column number and row number.
-    /// # Arguments
-    /// * `col` - Specify the column number. (first column number is 1)
-    /// * `row` - Specify the row number. (first row number is 1)
-    /// # Return value
-    /// * `&CellValue` - CellValue.
-    /// # Examples
-    /// ```
-    /// let book = umya_spreadsheet::new_file();
-    /// let worksheet = book.get_sheet(&0).unwrap();
-    /// let cell_value = worksheet.get_style_by_column_and_row(&1, &1);  // get cell from A1.
-    /// ```
-    #[deprecated(note = "use `get_cell_value` instead")]
-    pub fn get_cell_value_by_column_and_row(&self, col: &u32, row: &u32) -> &CellValue {
-        self.cell_collection.get_cell_value(col, row)
-    }
-
-    /// Get cell value with mutable.
-    /// # Arguments
-    /// * `coordinate` - Specify the coordinates. ex) `"A1"` or `(1, 1)`
-    /// # Return value
-    /// * `&mut CellValue` - CellValue with mutable.
-    /// # Examples
-    /// ```
-    /// let mut book = umya_spreadsheet::new_file();
-    /// let mut worksheet = book.get_sheet_mut(&0).unwrap();
-    /// let cell_value = worksheet.get_cell_value_mut("A1");
-    /// // or pass in a tuple `(col, row)`, both col and row starting at `1`
-    /// let cell_value = worksheet.get_cell_value_mut((1, 1));
-    /// ```
-    pub fn get_cell_value_mut<T>(&mut self, coordinate: T) -> &mut CellValue
-    where
-        T: Into<CellCoordinates>,
-    {
-        let CellCoordinates { col, row } = coordinate.into();
-        self.get_row_dimension_mut(&row);
-        self.cell_collection.get_mut(&col, &row).get_cell_value_mut()
-    }
-
-    /// Gets the cell value with mutable by specifying the column number and row number.
-    /// # Arguments
-    /// * `col` - Specify the column number. (first column number is 1)
-    /// * `row` - Specify the row number. (first row number is 1)
-    /// # Return value
-    /// *`&mut CellValue` - CellValue with mutable.
-    /// # Examples
-    /// ```
-    /// let mut book = umya_spreadsheet::new_file();
-    /// let mut worksheet = book.get_sheet_mut(&0).unwrap();
-    /// let cell_value = worksheet.get_cell_value_by_column_and_row_mut(&1, &1);  // get cell_value from A1.
-    /// ```
-    #[deprecated(note = "use `get_cell_value_mut` instead")]
-    pub fn get_cell_value_by_column_and_row_mut(&mut self, col: &u32, row: &u32) -> &mut CellValue {
-        self.get_row_dimension_mut(&row);
-        self.cell_collection.get_mut(col, row).get_cell_value_mut()
-    }
-
     /// Gets the cell value by specifying an range.
     /// # Arguments
     /// * `range` - range. ex) "A1:C5"
@@ -404,7 +326,7 @@ impl Worksheet {
     /// let mut worksheet = book.get_sheet_mut(&0).unwrap();
     /// let mut cell_value_List = worksheet.get_cell_value_by_range("A1:C5");
     /// ```
-    pub fn get_cell_value_by_range(&self, range: &str) -> Vec<&CellValue> {
+    pub(crate) fn get_cell_value_by_range(&self, range: &str) -> Vec<&CellValue> {
         self.cell_collection.get_cell_value_by_range(range)
     }