diff --git a/lib/fluent/supervisor.rb b/lib/fluent/supervisor.rb
index 10865c1ab4..51e4563860 100644
--- a/lib/fluent/supervisor.rb
+++ b/lib/fluent/supervisor.rb
@@ -315,6 +315,7 @@ def self.load_config(path, params = {})
       )
       # this #init sets initialized logger to $log
       logger_initializer.init(:supervisor, 0)
+      logger_initializer.apply_options(format: params['log_format'], time_format: params['log_time_format'])
       logger = $log
 
       command_sender = Fluent.windows? ? "pipe" : "signal"
@@ -691,6 +692,8 @@ def supervise
         'rpc_endpoint' => @system_config.rpc_endpoint,
         'enable_get_dump' => @system_config.enable_get_dump,
         'counter_server' => @system_config.counter_server,
+        'log_format' => @system_config.log.format,
+        'log_time_format' => @system_config.log.time_format,
       }
 
       se = ServerEngine.create(ServerModule, WorkerModule){
diff --git a/test/test_supervisor.rb b/test/test_supervisor.rb
index f4b3fd39b9..6779a0057c 100644
--- a/test/test_supervisor.rb
+++ b/test/test_supervisor.rb
@@ -235,6 +235,33 @@ def test_load_config
     Timecop.return
   end
 
+  def test_load_config_for_logger
+    tmp_dir = "#{TMP_DIR}/dir/test_load_config_log.conf"
+    conf_info_str = %[
+<system>
+  <log>
+    format json
+    time_format %FT%T.%L%z
+  </log>
+</system>
+]
+    write_config tmp_dir, conf_info_str
+    params = {
+      'use_v1_config' => true,
+      'conf_encoding' => 'utf8',
+      'log_level' => Fluent::Log::LEVEL_INFO,
+      'log_path' => 'test/tmp/supervisor/log',
+
+      'workers' => 1,
+      'log_format' => :json,
+      'log_time_format' => '%FT%T.%L%z',
+    }
+
+    r = Fluent::Supervisor.load_config(tmp_dir, params)
+    assert_equal :json, r[:logger].format
+    assert_equal '%FT%T.%L%z', r[:logger].time_format
+  end
+
   def test_load_config_for_daemonize
     tmp_dir = "#{TMP_DIR}/dir/test_load_config.conf"
     conf_info_str = %[