diff --git a/handlers/base.py b/handlers/base.py
index ba03a18..48ed890 100644
--- a/handlers/base.py
+++ b/handlers/base.py
@@ -23,7 +23,7 @@ from domain.result import TaskResult, ErrorCode
 from domain.config import WorkerConfig
 from services import storage
 from services.cache import MaterialCache
-from util.tracing import mark_span_error, start_span
+from util.tracing import get_current_task_context, mark_span_error, start_span
 from constant import (
     HW_ACCEL_NONE, HW_ACCEL_QSV, HW_ACCEL_CUDA,
     VIDEO_ENCODE_PARAMS, VIDEO_ENCODE_PARAMS_QSV, VIDEO_ENCODE_PARAMS_CUDA
@@ -413,10 +413,15 @@ class BaseHandler(TaskHandler, ABC):
         if timeout is None:
             timeout = self.config.download_timeout
 
+        task_context = get_current_task_context()
+        task_prefix = f"[task:{task_context.task_id}] " if task_context else ""
+        logger.debug(f"{task_prefix}Downloading from: {url} -> {dest}")
+
         with start_span(
             "render.task.file.download",
             kind=SpanKind.CLIENT,
             attributes={
+                "render.file.source_url": url,
                 "render.file.destination": dest,
                 "render.file.use_cache": use_cache,
             },
@@ -429,13 +434,14 @@ class BaseHandler(TaskHandler, ABC):
 
                 if result:
                     file_size = os.path.getsize(dest) if os.path.exists(dest) else 0
-                    logger.debug(f"Downloaded: {url} -> {dest} ({file_size} bytes)")
+                    logger.debug(f"{task_prefix}Downloaded: {url} -> {dest} ({file_size} bytes)")
                     if span is not None:
                         span.set_attribute("render.file.size_bytes", file_size)
                 return result
             except Exception as e:
                 mark_span_error(span, str(e), ErrorCode.E_INPUT_UNAVAILABLE.value)
-                logger.error(f"Download failed: {url} -> {e}")
+                logger.error(f"{task_prefix}Download failed: {e}")
+                logger.debug(f"{task_prefix}Download source address: {url}")
                 return False
 
     def upload_file(
@@ -477,11 +483,22 @@ class BaseHandler(TaskHandler, ABC):
                 logger.error(f"[task:{task_id}] Invalid upload URL response")
                 return None
 
+            logger.debug(
+                f"[task:{task_id}] Upload target address: uploadUrl={upload_url}, accessUrl={access_url}"
+            )
+            if span is not None:
+                span.set_attribute("render.file.upload_url", upload_url)
+                if access_url:
+                    span.set_attribute("render.file.access_url", access_url)
+
             try:
                 result = storage.upload_file(upload_url, file_path, timeout=self.config.upload_timeout)
                 if result:
                     file_size = os.path.getsize(file_path)
-                    logger.info(f"[task:{task_id}] Uploaded: {file_path} ({file_size} bytes)")
+                    logger.info(
+                        f"[task:{task_id}] Uploaded: {file_path} ({file_size} bytes)"
+                    )
+                    logger.debug(f"[task:{task_id}] Uploaded access address: {access_url or upload_url}")
                     if span is not None:
                         span.set_attribute("render.file.size_bytes", file_size)
 
diff --git a/index.py b/index.py
index 1faf86c..f8c46a5 100644
--- a/index.py
+++ b/index.py
@@ -46,7 +46,8 @@ def setup_logging():
 
     # 获取根logger
     root_logger = logging.getLogger()
-    root_logger.setLevel(logging.INFO)
+    # 允许 DEBUG 日志流入各 handler（具体是否落盘由 handler 级别决定）
+    root_logger.setLevel(logging.DEBUG)
 
     # 清除已有的handlers（避免重复）
     root_logger.handlers.clear()
diff --git a/services/storage.py b/services/storage.py
index 5baab41..4387bcf 100644
--- a/services/storage.py
+++ b/services/storage.py
@@ -86,7 +86,7 @@ def upload_file(url: str, file_path: str, max_retries: int = 5, timeout: int = 6
 
     # 检查是否使用 rclone 上传
     if os.getenv("UPLOAD_METHOD") == "rclone":
-        logger.info(f"Uploading to: {url}")
+        logger.debug(f"Uploading to: {url}")
         result = _upload_with_rclone(url, file_path)
         if result:
             return True
@@ -95,7 +95,7 @@ def upload_file(url: str, file_path: str, max_retries: int = 5, timeout: int = 6
     # 应用 HTTP_REPLACE_MAP 替换 URL
     http_url = _apply_http_replace_map(url)
     content_type = _get_content_type(file_path)
-    logger.info(f"Uploading to: {http_url} (Content-Type: {content_type})")
+    logger.debug(f"Uploading to: {http_url} (Content-Type: {content_type})")
 
     retries = 0
     while retries < max_retries:
@@ -152,7 +152,8 @@ def _upload_with_rclone(url: str, file_path: str) -> bool:
         return False
 
     if new_url.startswith(("http://", "https://")):
-        logger.warning(f"rclone upload skipped: URL still starts with http after replace: {new_url}")
+        logger.warning("rclone upload skipped: URL still starts with http after replace")
+        logger.debug(f"rclone upload skipped address: {new_url}")
         return False
 
     cmd = [
@@ -207,7 +208,7 @@ def download_file(
         logger.debug(f"File exists, skipping download: {file_path}")
         return True
 
-    logger.info(f"Downloading: {url}")
+    logger.debug(f"Downloading: {url}")
 
     # 确保目标目录存在
     file_dir = os.path.dirname(file_path)
@@ -239,5 +240,6 @@ def download_file(
             retries += 1
             logger.warning(f"Download failed ({e}). Retrying {retries}/{max_retries}...")
 
-    logger.error(f"Download failed after {max_retries} retries: {url}")
+    logger.error(f"Download failed after {max_retries} retries")
+    logger.debug(f"Download failed source address: {url}")
     return False