diff --git a/examples/rag_bm.py b/examples/rag_bm.py
index bffe1e49b..9cfbac7a3 100644
--- a/examples/rag_bm.py
+++ b/examples/rag_bm.py
@@ -17,9 +17,12 @@ from metagpt.rag.schema import (
     FAISSRetrieverConfig,
     FlagEmbeddingConfig,
     LLMRankerConfig,
+    CohereRerankConfig,
+    ColbertRerankConfig,
 )
 from metagpt.utils.common import write_json_file
-
+import time
+import pdb
 DOC_PATH = EXAMPLE_DATA_PATH / "rag_bm/summary_writer.txt"
 QUESTION = "2023年7月20日，应急管理部、财政部联合下发《因灾倒塌、损坏住房恢复重建救助工作规范》的通知，规范倒损住房恢复重建救助相关工作。"
 
@@ -44,27 +47,28 @@ class RAGExample:
         self.embedding = get_rag_embedding()
         self.llm = get_rag_llm()
 
-    async def rag_evaluate_pipeline(self, dataset_name: list[str] = ["CRUD"]):
+    async def rag_evaluate_pipeline(self, dataset_name: list[str] = ["RGB_en"]):
         dataset_config = self.benchmark.load_dataset(dataset_name)
-
+    
         for dataset in dataset_config.datasets:
             if "all" in dataset_name or dataset.name in dataset_name:
                 output_dir = DATA_PATH / f"{dataset.name}"
 
                 if os.path.exists(output_dir):
                     logger.info("Loading Exists index!")
+                    logger.info(f"Index Path:{output_dir}")
                     self.engine = SimpleEngine.from_index(
-                        index_config=FAISSIndexConfig(persist_path=output_dir),
-                        ranker_configs=[LLMRankerConfig()],
+                        index_config=FAISSIndexConfig(),
+                        ranker_configs=[ColbertRerankConfig()],
                         retriever_configs=[FAISSRetrieverConfig(persist_path=output_dir), BM25RetrieverConfig()],
                     )
                 else:
                     logger.info("Loading index from document!")
                     self.engine = SimpleEngine.from_docs(
                         input_files=dataset.document_files,
-                        retriever_configs=[FAISSRetrieverConfig(persist_path=output_dir), BM25RetrieverConfig()],
-                        ranker_configs=[FlagEmbeddingConfig()],
-                        transformations=[SentenceSplitter(chunk_size=256, chunk_overlap=0)],
+                        retriever_configs=[FAISSRetrieverConfig()],
+                        ranker_configs=[CohereRerankConfig()],
+                        transformations=[SentenceSplitter(chunk_size=1024, chunk_overlap=0)],
                     )
                 results = []
                 for gt_info in dataset.gt_info:
@@ -74,7 +78,7 @@ class RAGExample:
                         ground_truth=gt_info["gt_answer"],
                     )
                     results.append(result)
-                logger.info(f"=====The {dataset.name} BenchMark dataset assessment is complete!=====")
+                logger.info(f"=====The {dataset.name} Benchmark dataset assessment is complete!=====")
                 self._print_bm_result(results)
 
                 write_json_file(os.path.join(EXAMPLE_BENCHMARK_PATH, dataset.name, "bm_result.json"), results, "utf-8")
@@ -115,37 +119,18 @@ class RAGExample:
             self._print_title("RAG Pipeline")
         try:
             nodes = await self.engine.aretrieve(question)
-            #    pdb.set_trace()
             self._print_result(nodes, state="Retrieve")
 
             answer = await self.engine.aquery(question)
             self._print_result(answer, state="Query")
 
         except Exception as e:
-            print(e)
-            return {
-                "metrics": {
-                    "bleu-avg": 0.0,
-                    "bleu-1": 0.0,
-                    "bleu-2": 0.0,
-                    "bleu-3": 0.0,
-                    "bleu-4": 0.0,
-                    "rouge-L": 0.0,
-                    "semantic similarity": 0.0,
-                    "recall": 0.0,
-                    "hit_rate": 0.0,
-                    "mrr": 0.0,
-                    "length": 0,
-                },
-                "log": {
-                    "generated_text": "Retrieve failed due to LLM wasn't follow instruction",
-                    "ground_truth_text": ground_truth,
-                    "question": question,
-                },
-            }
+            logger.error(e)
+            return self.benchmark._set_metrics(
+                generated_text=LLM_ERROR, ground_truth_text=ground_truth, question=question
+            )
 
-        result = await self.evaluate_result(answer.response, ground_truth, nodes, reference)
-        result["log"]["question"] = question
+        result = await self.evaluate_result(answer.response, ground_truth, nodes, reference, question)
 
         logger.info("==========RAG BenchMark result demo as follows==========")
         logger.info(result)
@@ -186,32 +171,10 @@ class RAGExample:
         reference: str = None,
         nodes: list[NodeWithScore] = None,
         reference_doc: list[str] = None,
+        question: str = None,
     ):
-        recall = self.benchmark.recall(nodes, reference_doc)
-        bleu_avg, bleu1, bleu2, bleu3, bleu4 = self.benchmark.bleu_score(response, reference)
-        rouge_l = self.benchmark.rougel_score(response, reference)
-        hit_rate = self.benchmark.HitRate(nodes, reference_doc)
-        mrr = self.benchmark.MRR(nodes, reference_doc)
+        result = await self.benchmark.compute_metric(response, reference, nodes, reference_doc, question)
 
-        result = {
-            "metrics": {
-                "bleu-avg": bleu_avg or 0.0,
-                "bleu-1": bleu1 or 0.0,
-                "bleu-2": bleu2 or 0.0,
-                "bleu-3": bleu3 or 0.0,
-                "bleu-4": bleu4 or 0.0,
-                "rouge-L": rouge_l,
-                "semantic similarity": await self.benchmark.SemanticSimilarity(response, reference),
-                "recall": recall,
-                "hit_rate": hit_rate,
-                "mrr": mrr,
-                "length": len(response),
-            },
-            "log": {
-                "generated_text": response,
-                "ground_truth_text": reference,
-            },
-        }
         return result
 
     @staticmethod