diff --git a/src/PosTagger.hpp b/src/PosTagger.hpp
new file mode 100644
index 0000000..99ad049
--- /dev/null
+++ b/src/PosTagger.hpp
@@ -0,0 +1,71 @@
+#ifndef CPPJIEBA_POS_TAGGING_H
+#define CPPJIEBA_POS_TAGGING_H
+
+#include "MixSegment.hpp"
+#include "Limonp/str_functs.hpp"
+#include "Trie.hpp"
+#include "TrieManager.hpp"
+
+namespace CppJieba
+{
+    using namespace Limonp;
+
+    class PosTagger: public InitOnOff
+    {
+        private:
+            MixSegment _segment;
+            Trie* _trie;
+
+        public:
+            PosTagger(){_setInitFlag(false);};
+            explicit PosTagger(const string& dictPath, const string& hmmFilePath, const string& charStatus, const string& startProb, const string& emitProb, const string& endProb, const string transProb)
+            {
+                _setInitFlag(init(dictPath, hmmFilePath, charStatus, startProb, emitProb, endProb, transProb));
+            };
+            ~PosTagger(){};
+        public:
+            bool init(const string& dictPath, const string& hmmFilePath, const string& charStatus, const string& startProb, const string& emitProb, const string& endProb, const string transProb)
+            {
+                if (_getInitFlag())
+                {
+                    LogError("already inited before.");
+                    return false;
+                }
+                _trie = TrieManager::getInstance().getTrie(dictPath.c_str());
+                if (NULL == _trie)
+                {
+                    LogError("get a NULL pointor from getTrie(\"%s\").", dictPath.c_str());
+                    return false;
+                }
+                return _setInitFlag(_segment.init(dictPath, hmmFilePath));
+            };
+
+            bool tag(const string& src, vector<pair<string, string> >& res)
+            {
+                assert(_getInitFlag());
+                vector<string> cutRes;
+                if (!_segment.cut(src, cutRes))
+                {
+                    LogError("_mixSegment cut failed");
+                    return false;
+                }
+
+                const TrieNodeInfo *tmp = NULL;
+                Unicode unico;
+                for (vector<string>::iterator itr = cutRes.begin(); itr != cutRes.end(); ++itr)
+                {
+                    if (!TransCode::decode(*itr, unico))
+                    {
+                        LogError("decode failed.");
+                        return false;
+                    }
+                    tmp = _trie->find(unico.begin(), unico.end());
+                    res.push_back(make_pair(*itr, tmp == NULL ? "x" : tmp->tag));
+                }
+                tmp = NULL;
+                return !res.empty();
+            }
+    };
+}
+
+#endif
diff --git a/test/tagging_demo.cpp b/test/tagging_demo.cpp
new file mode 100644
index 0000000..5b341f9
--- /dev/null
+++ b/test/tagging_demo.cpp
@@ -0,0 +1,12 @@
+#include "../src/PosTagger.hpp"
+using namespace CppJieba;
+
+int main(int argc, char ** argv)
+{
+    PosTagger tagger("../dict/jieba.dict.utf8", "../dict/hmm_model.utf8", "", "", "", "", "");
+    string s("我是蓝翔技工拖拉机学院手扶拖拉机专业的。不用多久，我就会升职加薪，当上总经理，出任CEO，迎娶白富美，走上人生巅峰。");
+    vector<pair<string, string> > res;
+    tagger.tag(s, res);
+    cout << res << endl;
+    return EXIT_SUCCESS;
+}