diff --git a/src/ner/model.cpp b/src/ner/model.cpp
deleted file mode 100644
index ecff88906..000000000
--- a/src/ner/model.cpp
+++ /dev/null
@@ -1,86 +0,0 @@
-#include "ner/model.h"
-
-namespace ltp {
-namespace ner {
-
-Model::Model() {
-}
-
-Model::~Model() {
-}
-
-void
-Model::save(std::ostream & ofs) {
-  // write a signature into the file
-  char chunk[16] = {'o','t','n','e','r', '\0'};
-  ofs.write(chunk, 16);
-
-  int off = ofs.tellp();
-
-  unsigned labels_offset    = 0;
-  unsigned lexicon_offset   = 0;
-  unsigned feature_offset   = 0;
-  unsigned parameter_offset   = 0;
-
-  write_uint(ofs, 0); //  the label offset
-  write_uint(ofs, 0); //  the cluster lexicon offset
-  write_uint(ofs, 0); //  the features offset
-  write_uint(ofs, 0); //  the parameter offset
-
-  labels_offset = ofs.tellp();
-  labels.dump(ofs);
-
-  lexicon_offset = ofs.tellp();
-  cluster_lexicon.dump(ofs);
-
-  feature_offset = ofs.tellp();
-  space.dump(ofs);
-
-  parameter_offset = ofs.tellp();
-  param.dump(ofs);
-
-  ofs.seekp(off);
-  write_uint(ofs, labels_offset);
-  write_uint(ofs, lexicon_offset);
-  write_uint(ofs, feature_offset);
-  write_uint(ofs, parameter_offset);
-}
-
-bool Model::load(std::istream & ifs) {
-  char chunk[16];
-  ifs.read(chunk, 16);
-
-  if (strcmp(chunk, "otner")) {
-    return false;
-  }
-
-  unsigned labels_offset  = read_uint(ifs);
-  unsigned lexicon_offset   = read_uint(ifs);
-  unsigned feature_offset   = read_uint(ifs);
-  unsigned parameter_offset = read_uint(ifs);
-
-  ifs.seekg(labels_offset);
-  if (!labels.load(ifs)) {
-    return false;
-  }
-
-  ifs.seekg(lexicon_offset);
-  if (!cluster_lexicon.load(ifs)) {
-    return false;
-  }
-
-  ifs.seekg(feature_offset);
-  if (!space.load(labels.size(), ifs)) {
-    return false;
-  }
-
-  ifs.seekg(parameter_offset);
-  if (!param.load(ifs)) {
-    return false;
-  }
-
-  return true;
-}
-
-}     //  end for namespace ner
-}     //  end for namespace ltp
diff --git a/src/ner/model.h b/src/ner/model.h
deleted file mode 100644
index dfc8e1de4..000000000
--- a/src/ner/model.h
+++ /dev/null
@@ -1,58 +0,0 @@
-#ifndef __LTP_NER_MODEL_H__
-#define __LTP_NER_MODEL_H__
-
-#include "framework/serializable.h"
-#include "ner/featurespace.h"
-#include "ner/parameter.h"
-#include "utils/smartmap.hpp"
-
-namespace ltp {
-namespace ner {
-
-namespace utils = ltp::utility;
-
-class Model : public framework::Serializable {
-public:
-  Model();
-  ~Model();
-
-  /*
-   * get number of labels;
-   *
-   *  @return   int   the number of labels
-   */
-  inline int num_labels(void) {
-    return labels.size();
-  }
-
-  /*
-   * save the model to a output stream
-   *
-   *  @param[out] ofs   the output stream
-   */
-  void save(std::ostream & ofs);
-
-  /*
-   * load the model from an input stream
-   *
-   *  @param[in]  ifs   the input stream
-   */
-  bool load(std::istream & ifs);
-public:
-  //!
-  utils::IndexableSmartMap labels;
-
-  //!
-  FeatureSpace space;
-
-  //!
-  Parameters param;
-
-  //!
-  utils::SmartMap<int> cluster_lexicon;
-};
-
-}     //  end for namespace ner
-}     //  end for namespace ltp
-
-#endif  //  end for __LTP_NER_MODEL_H__