diff --git a/dtable_events/app/log.py b/dtable_events/app/log.py
index fac8d69e..35329212 100644
--- a/dtable_events/app/log.py
+++ b/dtable_events/app/log.py
@@ -36,8 +36,8 @@ def _rotating_config(self):
     def _basic_config(self):
         # Log to stdout. Mainly for development.
         kw = {
-            'format': '[%(asctime)s] %(filename)s[line:%(lineno)d] [%(levelname)s] %(message)s',
-            'datefmt': '%m/%d/%Y %H:%M:%S',
+            'format': '[%(asctime)s] [%(levelname)s] %(filename)s[line:%(lineno)d] %(message)s',
+            'datefmt': '%Y-%m-%d %H:%M:%S',
             'level': self._level,
             'stream': sys.stdout
         }
diff --git a/dtable_events/dtable_io/utils.py b/dtable_events/dtable_io/utils.py
index ac4fbabb..1154f358 100644
--- a/dtable_events/dtable_io/utils.py
+++ b/dtable_events/dtable_io/utils.py
@@ -44,8 +44,13 @@ def setup_logger(logname):
     """
     logdir = os.path.join(os.environ.get('LOG_DIR', ''))
     log_file = os.path.join(logdir, logname)
-    handler = handlers.TimedRotatingFileHandler(log_file, when='MIDNIGHT', interval=1, backupCount=7)
-    formatter = logging.Formatter('%(asctime)s [%(levelname)s] %(message)s')
+
+    if os.environ.get('SEATABLE_LOG_TO_STDOUT', 'false').lower() == 'true':
+        handler = logging.StreamHandler(sys.stdout)
+    else:
+        handler = handlers.TimedRotatingFileHandler(log_file, when='MIDNIGHT', interval=1, backupCount=7)
+
+    formatter = logging.Formatter('[%(asctime)s] [%(levelname)s] %(message)s', datefmt='%Y-%m-%d %H:%M:%S')
     handler.setFormatter(formatter)
     handler.addFilter(logging.Filter(logname))
 
diff --git a/dtable_events/tasks/dtable_rows_counter.py b/dtable_events/tasks/dtable_rows_counter.py
index 00421ecf..ec02bc47 100644
--- a/dtable_events/tasks/dtable_rows_counter.py
+++ b/dtable_events/tasks/dtable_rows_counter.py
@@ -67,8 +67,12 @@ def run(self):
                         manage_py,
                         'count_user_org_rows'
                     ]
-                    with open(self._logfile, 'a') as fp:
-                        run(cmd, cwd=dtable_web_dir, output=fp)
+
+                    if os.environ.get('SEATABLE_LOG_TO_STDOUT', 'false').lower() == 'true':
+                        run(cmd, cwd=dtable_web_dir)
+                    else:
+                        with open(self._logfile, 'a') as fp:
+                            run(cmd, cwd=dtable_web_dir, output=fp)
                 except Exception as e:
                     logging.exception('error when counting rows: %s', e)
 
diff --git a/dtable_events/tasks/dtable_updates_sender.py b/dtable_events/tasks/dtable_updates_sender.py
index 0d0860e8..5033df1a 100644
--- a/dtable_events/tasks/dtable_updates_sender.py
+++ b/dtable_events/tasks/dtable_updates_sender.py
@@ -72,8 +72,12 @@ def run(self):
                         manage_py,
                         'send_dtable_updates',
                     ]
-                    with open(self._logfile, 'a') as fp:
-                        run_and_wait(cmd, cwd=dtable_web_dir, output=fp)
+
+                    if os.environ.get('SEATABLE_LOG_TO_STDOUT', 'false').lower() == 'true':
+                        run_and_wait(cmd, cwd=dtable_web_dir)
+                    else:
+                        with open(self._logfile, 'a') as fp:
+                            run_and_wait(cmd, cwd=dtable_web_dir, output=fp)
                 except Exception as e:
                     logging.exception('send dtable updates email error: %s', e)
 
diff --git a/dtable_events/tasks/dtables_cleaner.py b/dtable_events/tasks/dtables_cleaner.py
index 80b78993..2b6ed795 100644
--- a/dtable_events/tasks/dtables_cleaner.py
+++ b/dtable_events/tasks/dtables_cleaner.py
@@ -64,8 +64,11 @@ def run(self):
                         'clean_trash_dtables',
                         self._expire_seconds,
                     ]
-                    with open(self._logfile, 'a') as fp:
-                        run(cmd, cwd=dtable_web_dir, output=fp)
+                    if os.environ.get('SEATABLE_LOG_TO_STDOUT', 'false').lower() == 'true':
+                        run(cmd, cwd=dtable_web_dir)
+                    else:
+                        with open(self._logfile, 'a') as fp:
+                            run(cmd, cwd=dtable_web_dir, output=fp)
                 except Exception as e:
                     logging.exception('error when cleaning trash dtables: %s', e)
 
diff --git a/dtable_events/tasks/email_notices_sender.py b/dtable_events/tasks/email_notices_sender.py
index fd4c59b2..9ce2ac5d 100644
--- a/dtable_events/tasks/email_notices_sender.py
+++ b/dtable_events/tasks/email_notices_sender.py
@@ -77,8 +77,12 @@ def run(self):
                         manage_py,
                         'send_email_notices',
                     ]
-                    with open(self._logfile, 'a') as fp:
-                        run(cmd, cwd=dtable_web_dir, output=fp)
+
+                    if os.environ.get('SEATABLE_LOG_TO_STDOUT', 'false').lower() == 'true':
+                        run(cmd, cwd=dtable_web_dir)
+                    else:
+                        with open(self._logfile, 'a') as fp:
+                            run(cmd, cwd=dtable_web_dir, output=fp)
                 except Exception as e:
                     logging.exception('error when send email: %s', e)
 
diff --git a/dtable_events/tasks/instant_notices_sender.py b/dtable_events/tasks/instant_notices_sender.py
index a28db800..0847f500 100644
--- a/dtable_events/tasks/instant_notices_sender.py
+++ b/dtable_events/tasks/instant_notices_sender.py
@@ -85,8 +85,11 @@ def run(self):
                         'send_instant_notices',
                     ]
 
-                    with open(self._logfile, 'a') as fp:
-                        run(cmd, cwd=dtable_web_dir, output=fp)
+                    if os.environ.get('SEATABLE_LOG_TO_STDOUT', 'false').lower() == 'true':
+                        run(cmd, cwd=dtable_web_dir)
+                    else:
+                        with open(self._logfile, 'a') as fp:
+                            run(cmd, cwd=dtable_web_dir, output=fp)
                 except Exception as e:
                     logging.exception('send instant notices error: %s', e)
 
diff --git a/dtable_events/tasks/ldap_syncer.py b/dtable_events/tasks/ldap_syncer.py
index 3ac302b5..4d7cea01 100644
--- a/dtable_events/tasks/ldap_syncer.py
+++ b/dtable_events/tasks/ldap_syncer.py
@@ -80,8 +80,12 @@ def run(self):
                         manage_py,
                         'ldap_group_sync'
                     ]
-                    with open(self._logfile, 'a') as fp:
-                        run_and_wait(cmd, cwd=dtable_web_dir, output=fp)
+
+                    if os.environ.get('SEATABLE_LOG_TO_STDOUT', 'false').lower() == 'true':
+                        run_and_wait(cmd, cwd=dtable_web_dir)
+                    else:
+                        with open(self._logfile, 'a') as fp:
+                            run_and_wait(cmd, cwd=dtable_web_dir, output=fp)
                 except Exception as e:
                     logging.exception('error when sync ldap group: %s', e)