diff --git a/example/text_io_ex.cpp b/example/text_io_ex.cpp
index 81ce3ea..1e343de 100644
--- a/example/text_io_ex.cpp
+++ b/example/text_io_ex.cpp
@@ -54,6 +54,9 @@ int main(int argc, char const *argv[]) try
     geodsv_io tc;
     tc.load_text("tmp/topo", ".txt", ColumnHead);
     tc.set_column_names({"x (m)", "y (m)", "elev (m)"});
+    //tc.set_column_type(Float, "x (m)");
+    //tc.set_column_type(Float, "y (m)");
+    tc.set_column_type(Float, "elev (m)");
 
     array<point3dc> topo;
     tc.get_column_point3dc(topo, 1, 2, 3);
diff --git a/lib/io/dsv_io.cpp b/lib/io/dsv_io.cpp
index 23ac94e..b66c88f 100644
--- a/lib/io/dsv_io.cpp
+++ b/lib/io/dsv_io.cpp
@@ -114,6 +114,43 @@ void gctl::dsv_io::set_column_names(const std::vector<std::string> &names)
     return;
 }
 
+void gctl::dsv_io::set_row_type(cell_type_e t, int idx)
+{
+    if (idx > row_num_ || idx <= 0)
+    {
+        throw std::runtime_error("[gctl::dsv_io] Invalid column index.");
+    }
+
+    for (size_t i = 0; i <= col_num_; i++)
+    {
+        table_[idx][i].type_ = t;
+    }
+}
+
+void gctl::dsv_io::set_row_type(cell_type_e t, std::string name)
+{
+    set_row_type(t, name_index(name, true));
+}
+
+void gctl::dsv_io::set_column_type(cell_type_e t, int idx)
+{
+    if (idx > col_num_ || idx <= 0)
+    {
+        throw std::runtime_error("[gctl::dsv_io] Invalid column index.");
+    }
+
+    for (size_t i = 0; i <= row_num_; i++)
+    {
+        table_[i][idx].type_ = t;
+    }
+    return;
+}
+
+void gctl::dsv_io::set_column_type(cell_type_e t, std::string name)
+{
+    set_column_type(t, name_index(name, false));
+}
+
 void gctl::dsv_io::load_text(std::string filename, std::string file_exten, table_headtype_e t)
 {
     std::ifstream infile;
@@ -169,7 +206,7 @@ void gctl::dsv_io::load_text(std::string filename, std::string file_exten, table
         table_[i].resize(tmp_cols.size());
         for (size_t j = 0; j < tmp_cols.size(); j++)
         {
-            table_[i][j].str_ = tmp_cols[j];
+            table_[i][j].value(tmp_cols[j]);
         }
     }
 
@@ -340,11 +377,19 @@ void gctl::dsv_io::info(table_headtype_e t)
         {
             if (table_[0][i].str_ != "")
             {
-                std::clog << table_[0][i].str_ << ": " << table_[1][i].str_ << " -> " << table_[row_num_][i].str_;
+                std::clog << table_[0][i].str_ << " | ";
+                if (table_[1][i].type_ == String) std::clog << "String | ";
+                if (table_[1][i].type_ == Int) std::clog << "Int | ";
+                if (table_[1][i].type_ == Float) std::clog << "Float | ";
+                std::clog << table_[1][i].str_ << " -> " << table_[row_num_][i].str_;
             }
             else
             {
-                std::clog << "C" + std::to_string(i) << ": " << table_[1][i].str_ << " -> " << table_[row_num_][i].str_;
+                std::clog << "C" + std::to_string(i) << " | ";
+                if (table_[1][i].type_ == String) std::clog << "String | ";
+                if (table_[1][i].type_ == Int) std::clog << "Int | ";
+                if (table_[1][i].type_ == Float) std::clog << "Float | ";
+                std::clog << table_[1][i].str_ << " -> " << table_[row_num_][i].str_;
             }
 
             if (!table_[0][i].out_ok_) std::clog << " (No output)";
@@ -360,11 +405,19 @@ void gctl::dsv_io::info(table_headtype_e t)
         {
             if (table_[i][0].str_ != "")
             {
-                std::clog << table_[i][0].str_ << ": " << table_[i][1].str_ << " -> " << table_[i][col_num_].str_;
+                std::clog << table_[i][0].str_ << " | ";
+                if (table_[i][1].type_ == String) std::clog << "String | ";
+                if (table_[i][1].type_ == Int) std::clog << "Int | ";
+                if (table_[i][1].type_ == Float) std::clog << "Float | ";
+                std::clog << table_[i][1].str_ << " -> " << table_[i][col_num_].str_;
             }
             else
             {
-                std::clog << "R" + std::to_string(i) << ": " << table_[i][1].str_ << " -> " << table_[i][col_num_].str_;
+                std::clog << "R" + std::to_string(i) << " | ";
+                if (table_[i][1].type_ == String) std::clog << "String | ";
+                if (table_[i][1].type_ == Int) std::clog << "Int | ";
+                if (table_[i][1].type_ == Float) std::clog << "Float | ";
+                std::clog << table_[i][1].str_ << " -> " << table_[i][col_num_].str_;
             }
 
             if (!table_[i][0].out_ok_) std::clog << " (No output)";
diff --git a/lib/io/dsv_io.h b/lib/io/dsv_io.h
index 7c1c13e..93785c9 100644
--- a/lib/io/dsv_io.h
+++ b/lib/io/dsv_io.h
@@ -35,14 +35,23 @@
 
 namespace gctl
 {
+	enum cell_type_e
+	{
+		String,
+		Int,
+		Float,
+	};
+
 	struct table_cell
 	{
 		std::string str_; // 单元格的内容 统一保存为字符串
+		cell_type_e type_; // 类型字符串
 		bool out_ok_; // 是否可输出到文件
 
 		table_cell()
 		{
 			str_ = "";
+			type_ = String;
 			out_ok_ = true;
 		}
 		
@@ -60,6 +69,18 @@ namespace gctl
 
 		template <typename T> void value(const T &in, int p = 6)
 		{
+			// 单元被赋值时使用的类型
+			const std::type_info &tinfo = typeid(T);
+
+			std::smatch ret;
+			std::regex pat("basic_string");
+			
+			std::string t_str = tinfo.name();
+			if (regex_search(t_str, ret, pat)) type_ = String;
+			else if (t_str == "i") type_ = Int;
+			else if (t_str == "f") type_ = Float;
+			else if (t_str == "d") type_ = Float;
+
 			// 对于double类型 可以设置转换的有效数字位数（精度）
 			if constexpr (std::is_same<T, double>::value)
 			{
@@ -258,6 +279,38 @@ namespace gctl
 		 */
 		void set_column_names(const std::vector<std::string> &names);
 
+		/**
+		 * @brief 设置行类型
+		 * 
+		 * @param t 类型名称 String|Float|Int
+		 * @param idx 行索引
+		 */
+		void set_row_type(cell_type_e t, int idx);
+
+		/**
+		 * @brief 设置行类型
+		 * 
+		 * @param t 类型名称 String|Float|Int
+		 * @param name 行名称
+		 */
+		void set_row_type(cell_type_e t, std::string name);
+
+		/**
+		 * @brief 设置列类型
+		 * 
+		 * @param t 类型名称 String|Float|Int
+		 * @param idx 列索引
+		 */
+		void set_column_type(cell_type_e t, int idx);
+
+		/**
+		 * @brief 设置列类型
+		 * 
+		 * @param t 类型名称 String|Float|Int
+		 * @param name 列名称
+		 */
+		void set_column_type(cell_type_e t, std::string name);
+
 		/**
 		 * @brief 读入文本文件
 		 *