diff --git a/trunk/src/app/srs_app_log.cpp b/trunk/src/app/srs_app_log.cpp
index 89885cd6a..38c10c4ff 100644
--- a/trunk/src/app/srs_app_log.cpp
+++ b/trunk/src/app/srs_app_log.cpp
@@ -18,6 +18,7 @@
 #include <srs_kernel_error.hpp>
 #include <srs_app_utility.hpp>
 #include <srs_kernel_utility.hpp>
+#include <srs_core_lock.hpp>
 
 // the max size of a line of log.
 #define LOG_MAX_SIZE 8192
@@ -35,6 +36,8 @@ SrsFileLog::SrsFileLog()
     fd = -1;
     log_to_file_tank = false;
     utc = false;
+
+    pthread_mutex_init(&mutex_, NULL);
 }
 
 SrsFileLog::~SrsFileLog()
@@ -49,6 +52,8 @@ SrsFileLog::~SrsFileLog()
     if (_srs_config) {
         _srs_config->unsubscribe(this);
     }
+
+    pthread_mutex_destroy(&mutex_);
 }
 
 srs_error_t SrsFileLog::initialize()
@@ -79,6 +84,8 @@ void SrsFileLog::reopen()
 
 void SrsFileLog::verbose(const char* tag, SrsContextId context_id, const char* fmt, ...)
 {
+    SrsScopeLock sl(&mutex_);
+
     if (level > SrsLogLevelVerbose) {
         return;
     }
@@ -99,6 +106,8 @@ void SrsFileLog::verbose(const char* tag, SrsContextId context_id, const char* f
 
 void SrsFileLog::info(const char* tag, SrsContextId context_id, const char* fmt, ...)
 {
+    SrsScopeLock sl(&mutex_);
+
     if (level > SrsLogLevelInfo) {
         return;
     }
@@ -119,6 +128,8 @@ void SrsFileLog::info(const char* tag, SrsContextId context_id, const char* fmt,
 
 void SrsFileLog::trace(const char* tag, SrsContextId context_id, const char* fmt, ...)
 {
+    SrsScopeLock sl(&mutex_);
+
     if (level > SrsLogLevelTrace) {
         return;
     }
@@ -139,6 +150,8 @@ void SrsFileLog::trace(const char* tag, SrsContextId context_id, const char* fmt
 
 void SrsFileLog::warn(const char* tag, SrsContextId context_id, const char* fmt, ...)
 {
+    SrsScopeLock sl(&mutex_);
+
     if (level > SrsLogLevelWarn) {
         return;
     }
@@ -159,6 +172,8 @@ void SrsFileLog::warn(const char* tag, SrsContextId context_id, const char* fmt,
 
 void SrsFileLog::error(const char* tag, SrsContextId context_id, const char* fmt, ...)
 {
+    SrsScopeLock sl(&mutex_);
+
     if (level > SrsLogLevelError) {
         return;
     }
diff --git a/trunk/src/app/srs_app_log.hpp b/trunk/src/app/srs_app_log.hpp
index a18662834..fc0cbcccd 100644
--- a/trunk/src/app/srs_app_log.hpp
+++ b/trunk/src/app/srs_app_log.hpp
@@ -39,6 +39,9 @@ private:
     bool log_to_file_tank;
     // Whether use utc time.
     bool utc;
+    // TODO: FIXME: use macro define like SRS_MULTI_THREAD_LOG to switch enable log mutex or not.
+    // Mutex for multithread log.
+    pthread_mutex_t mutex_;
 public:
     SrsFileLog();
     virtual ~SrsFileLog();
diff --git a/trunk/src/app/srs_app_srt_server.cpp b/trunk/src/app/srs_app_srt_server.cpp
index f3ef03d61..40c55a698 100644
--- a/trunk/src/app/srs_app_srt_server.cpp
+++ b/trunk/src/app/srs_app_srt_server.cpp
@@ -267,6 +267,10 @@ srs_error_t SrsSrtServerAdapter::initialize()
 {
     srs_error_t err = srs_success;
 
+    if ((err = srs_srt_log_initialie()) != srs_success) {
+        return srs_error_wrap(err, "srt log initialize");
+    }
+
     _srt_eventloop = new SrsSrtEventLoop();
 
     if ((err = _srt_eventloop->initialize()) != srs_success) {
diff --git a/trunk/src/protocol/srs_protocol_srt.cpp b/trunk/src/protocol/srs_protocol_srt.cpp
index 53b77c2c9..d92adfb3a 100644
--- a/trunk/src/protocol/srs_protocol_srt.cpp
+++ b/trunk/src/protocol/srs_protocol_srt.cpp
@@ -16,6 +16,9 @@ using namespace std;
 
 #include <srt/srt.h>
 
+// TODO: FIXME: protocol could no include app's header file, so define TAG_SRT in this file.
+#define TAG_SRT "SRT"
+
 #define SET_SRT_OPT_STR(srtfd, optname, buf, size)                                  \
     if (srt_setsockflag(srtfd, optname, buf, size) == SRT_ERROR) {                  \
         std::stringstream ss;                                                       \
@@ -43,6 +46,7 @@ using namespace std;
         }                                                                       \
     } while (0)
 
+
 static srs_error_t do_srs_srt_listen(srs_srt_t srt_fd, addrinfo* r)
 {
     srs_error_t err = srs_success;
@@ -72,6 +76,39 @@ static srs_error_t do_srs_srt_get_streamid(srs_srt_t srt_fd, string& streamid)
     return srs_success;
 }
 
+static void srs_srt_log_handler(void* opaque, int level, const char* file, int line, const char* area, const char* message)
+{
+    switch (level) {
+        case srt_logging::LogLevel::debug:
+            srs_info2(TAG_SRT, "%s:%d(%s) # %s", file, line, area, message);
+            break;
+        case srt_logging::LogLevel::note:
+            srs_trace2(TAG_SRT, "%s:%d(%s) # %s", file, line, area, message);
+            break;
+        case srt_logging::LogLevel::warning:
+            srs_warn2(TAG_SRT, "%s:%d(%s) # %s", file, line, area, message);
+            break;
+        case srt_logging::LogLevel::error:
+        case srt_logging::LogLevel::fatal:
+            srs_error2(TAG_SRT, "%s:%d(%s) # %s", file, line, area, message);
+            break;
+        default:
+            srs_trace2(TAG_SRT, "%s:%d(%s) # %s", file, line, area, message);
+            break;
+    }
+}
+
+srs_error_t srs_srt_log_initialie()
+{
+    srs_error_t err = srs_success;
+
+    srt_setlogflags(0 | SRT_LOGF_DISABLE_TIME | SRT_LOGF_DISABLE_SEVERITY |
+        SRT_LOGF_DISABLE_THREADNAME | SRT_LOGF_DISABLE_EOL);
+    srt_setloghandler(NULL, srs_srt_log_handler);
+
+    return err;
+}
+
 srs_srt_t srs_srt_socket_invalid()
 {
     return SRT_INVALID_SOCK;
diff --git a/trunk/src/protocol/srs_protocol_srt.hpp b/trunk/src/protocol/srs_protocol_srt.hpp
index a2f4189fe..219e12731 100644
--- a/trunk/src/protocol/srs_protocol_srt.hpp
+++ b/trunk/src/protocol/srs_protocol_srt.hpp
@@ -15,6 +15,8 @@
 
 class SrsSrtSocket;
 
+extern srs_error_t srs_srt_log_initialie();
+
 typedef int srs_srt_t;
 extern srs_srt_t srs_srt_socket_invalid();