diff --git a/scripts/iib/db/datamodel.py b/scripts/iib/db/datamodel.py
index 45c84ff..3f0b5a5 100644
--- a/scripts/iib/db/datamodel.py
+++ b/scripts/iib/db/datamodel.py
@@ -279,40 +279,65 @@ class Image:
     
     @classmethod
     def get_random_images(cls, conn: Connection, size: int) -> List["Image"]:
+        from scripts.iib.logger import logger
+        logger.info(f"Starting to get random images, requested size: {size}")
         images = []
         max_cyc = 10
         curr_cyc = 0
         with closing(conn.cursor()) as cur:
             while len(images) < size and curr_cyc < max_cyc:
                 curr_cyc += 1
+                logger.info(f"Starting attempt {curr_cyc} to get random images")
                 cur.execute("SELECT COUNT(*) FROM image")
                 total_count = cur.fetchone()[0]
+                logger.info(f"Total images in database: {total_count}")
 
                 if total_count == 0 or size <= 0:
+                    logger.warning(f"Cannot get random images: total_count={total_count}, requested_size={size}")
                     return []
 
                 step = max(1, total_count // size)
+                logger.info(f"Calculated step size: {step}")
 
                 start_indices = []
                 for i in range(size):
                     min_val = i * step
                     max_val = min((i + 1) * step - 1, total_count - 1)
-                    # 确保 max_val 不小于 min_val
+                    # Ensure max_val is not less than min_val
                     if max_val < min_val:
                         max_val = min_val
-                    # 确保索引在有效范围内 (1 到 total_count)
+                    # Ensure indices are within valid range (1 to total_count)
                     min_val = max(1, min(min_val, total_count))
                     max_val = max(1, min(max_val, total_count))
                     if min_val <= max_val:
-                        start_indices.append(random.randint(min_val, max_val))
+                        idx = random.randint(min_val, max_val)
+                        start_indices.append(idx)
+                        logger.debug(f"Generated random index [{i}]: range {min_val}-{max_val}, selected {idx}")
+                
+                logger.info(f"Generated random index list: {start_indices}")
                 
                 if start_indices:
                     placeholders = ",".join("?" * len(start_indices))
-                    cur.execute(f"SELECT * FROM image WHERE id IN ({placeholders})", start_indices)
+                    query = f"SELECT * FROM image WHERE id IN ({placeholders})"
+                    logger.debug(f"Executing SQL query: {query}, parameters: {start_indices}")
+                    cur.execute(query, start_indices)
                     rows = cur.fetchall()
-                    curr_images = [cls.from_row(row) for row in rows if os.path.exists(row[1])]
+                    logger.info(f"Query returned {len(rows)} records")
+                    
+                    curr_images = []
+                    for row in rows:
+                        path = row[1]
+                        if os.path.exists(path):
+                            curr_images.append(cls.from_row(row))
+                        else:
+                            logger.warning(f"Image file does not exist: {path}")
+                    
+                    logger.info(f"Valid images found in this cycle: {len(curr_images)}")
                     images.extend(curr_images)
                     images = unique_by(images, lambda x: x.path)
+                    logger.info(f"Total unique images after deduplication: {len(images)}")
+        
+        logger.info(f"Random image retrieval completed, final image count: {len(images)}")
         return images