diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 1eebcc4a8..623fd464d 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -516,6 +516,42 @@ int SrsConfig::reload()
         }
         srs_trace("reload pid success.");
     }
+    
+    // merge config: srs_log_tank
+    if (!srs_directive_equals(root->get("srs_log_tank"), old_root->get("srs_log_tank"))) {
+        for (it = subscribes.begin(); it != subscribes.end(); ++it) {
+            ISrsReloadHandler* subscribe = *it;
+            if ((ret = subscribe->on_reload_log_tank()) != ERROR_SUCCESS) {
+                srs_error("notify subscribes reload srs_log_tank failed. ret=%d", ret);
+                return ret;
+            }
+        }
+        srs_trace("reload srs_log_tank success.");
+    }
+    
+    // merge config: srs_log_level
+    if (!srs_directive_equals(root->get("srs_log_level"), old_root->get("srs_log_level"))) {
+        for (it = subscribes.begin(); it != subscribes.end(); ++it) {
+            ISrsReloadHandler* subscribe = *it;
+            if ((ret = subscribe->on_reload_log_level()) != ERROR_SUCCESS) {
+                srs_error("notify subscribes reload srs_log_level failed. ret=%d", ret);
+                return ret;
+            }
+        }
+        srs_trace("reload srs_log_level success.");
+    }
+    
+    // merge config: srs_log_file
+    if (!srs_directive_equals(root->get("srs_log_file"), old_root->get("srs_log_file"))) {
+        for (it = subscribes.begin(); it != subscribes.end(); ++it) {
+            ISrsReloadHandler* subscribe = *it;
+            if ((ret = subscribe->on_reload_log_file()) != ERROR_SUCCESS) {
+                srs_error("notify subscribes reload srs_log_file failed. ret=%d", ret);
+                return ret;
+            }
+        }
+        srs_trace("reload srs_log_file success.");
+    }
 
     // directly supported for reload:
     // chunk_size, ff_log_dir
diff --git a/trunk/src/app/srs_app_log.cpp b/trunk/src/app/srs_app_log.cpp
index 59c522d94..385f95ddf 100644
--- a/trunk/src/app/srs_app_log.cpp
+++ b/trunk/src/app/srs_app_log.cpp
@@ -32,6 +32,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <srs_app_config.hpp>
 #include <srs_kernel_error.hpp>
+#include <srs_app_utility.hpp>
 
 SrsThreadContext::SrsThreadContext()
 {
@@ -66,6 +67,7 @@ SrsFastLog::SrsFastLog()
     log_data = new char[LOG_MAX_SIZE];
 
     fd = -1;
+    log_to_file_tank = false;
 }
 
 SrsFastLog::~SrsFastLog()
@@ -76,22 +78,20 @@ SrsFastLog::~SrsFastLog()
         ::close(fd);
         fd = -1;
     }
+
+    _srs_config->unsubscribe(this);
 }
 
 int SrsFastLog::initialize()
 {
-    // TODO: support reload.
-    return ERROR_SUCCESS;
-}
+    int ret = ERROR_SUCCESS;
+    
+    _srs_config->subscribe(this);
 
-int SrsFastLog::level()
-{
-    return _level;
-}
-
-void SrsFastLog::set_level(int level)
-{
-    _level = level;
+    log_to_file_tank = _srs_config->get_srs_log_tank_file();
+    _level = srs_get_log_level(_srs_config->get_srs_log_level());
+    
+    return ret;
 }
 
 void SrsFastLog::verbose(const char* tag, int context_id, const char* fmt, ...)
@@ -197,6 +197,54 @@ void SrsFastLog::error(const char* tag, int context_id, const char* fmt, ...)
     write_log(fd, log_data, size, SrsLogLevel::Error);
 }
 
+int SrsFastLog::on_reload_log_tank()
+{
+    int ret = ERROR_SUCCESS;
+
+    bool tank = log_to_file_tank;
+    log_to_file_tank = _srs_config->get_srs_log_tank_file();
+
+    if (tank) {
+        return ret;
+    }
+
+    if (!log_to_file_tank) {
+        return ret;
+    }
+
+    if (fd > 0) {
+        ::close(fd);
+    }
+    open_log_file();
+    
+    return ret;
+}
+
+int SrsFastLog::on_reload_log_level()
+{
+    int ret = ERROR_SUCCESS;
+    
+    _level = srs_get_log_level(_srs_config->get_srs_log_level());
+    
+    return ret;
+}
+
+int SrsFastLog::on_reload_log_file()
+{
+    int ret = ERROR_SUCCESS;
+
+    if (!log_to_file_tank) {
+        return ret;
+    }
+
+    if (fd > 0) {
+        ::close(fd);
+    }
+    open_log_file();
+    
+    return ret;
+}
+
 bool SrsFastLog::generate_header(const char* tag, int context_id, const char* level_name, int* header_size)
 {
     // clock time
@@ -247,7 +295,8 @@ void SrsFastLog::write_log(int& fd, char *str_log, int size, int level)
     str_log[size++] = LOG_TAIL;
     str_log[size++] = 0;
     
-    if (fd < 0 || !_srs_config->get_srs_log_tank_file()) {
+    // if not to file, to console and return.
+    if (!log_to_file_tank) {
         // if is error msg, then print color msg.
         // \033[31m : red text code in shell
         // \033[32m : green text code in shell
@@ -260,24 +309,35 @@ void SrsFastLog::write_log(int& fd, char *str_log, int size, int level)
         } else{
             printf("\033[31m%s\033[0m", str_log);
         }
+
+        return;
     }
     
     // open log file. if specified
-    if (!_srs_config->get_srs_log_file().empty() && fd < 0) {
-        std::string filename = _srs_config->get_srs_log_file();
-        
-        fd = ::open(filename.c_str(), O_RDWR | O_APPEND);
-        
-        if(fd == -1 && errno == ENOENT) {
-            fd = open(filename.c_str(), 
-                O_RDWR | O_CREAT | O_TRUNC, 
-                S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH
-            );
-        }
+    if (fd < 0) {
+        open_log_file();
     }
     
     // write log to file.
-    if (fd > 0 && _srs_config->get_srs_log_tank_file()) {
+    if (fd > 0) {
         ::write(fd, str_log, size);
     }
 }
+
+void SrsFastLog::open_log_file()
+{
+    std::string filename = _srs_config->get_srs_log_file();
+    
+    if (filename.empty()) {
+        return;
+    }
+    
+    fd = ::open(filename.c_str(), O_RDWR | O_APPEND);
+    
+    if(fd == -1 && errno == ENOENT) {
+        fd = open(filename.c_str(), 
+            O_RDWR | O_CREAT | O_TRUNC, 
+            S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH
+        );
+    }
+}
diff --git a/trunk/src/app/srs_app_log.hpp b/trunk/src/app/srs_app_log.hpp
index 49be912fd..159855680 100644
--- a/trunk/src/app/srs_app_log.hpp
+++ b/trunk/src/app/srs_app_log.hpp
@@ -32,6 +32,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <srs_app_st.hpp>
 #include <srs_kernel_log.hpp>
+#include <srs_app_reload.hpp>
 
 #include <string.h>
 
@@ -57,7 +58,7 @@ public:
 /**
 * we use memory/disk cache and donot flush when write log.
 */
-class SrsFastLog : public ISrsLog
+class SrsFastLog : public ISrsLog, public ISrsReloadHandler
 {
 private:
     // defined in SrsLogLevel.
@@ -65,21 +66,27 @@ private:
     char* log_data;
     // log to file if specified srs_log_file
     int fd;
+    // whether log to file tank
+    bool log_to_file_tank;
 public:
     SrsFastLog();
     virtual ~SrsFastLog();
 public:
     virtual int initialize();
-    virtual int level();
-    virtual void set_level(int level);
     virtual void verbose(const char* tag, int context_id, const char* fmt, ...);
     virtual void info(const char* tag, int context_id, const char* fmt, ...);
     virtual void trace(const char* tag, int context_id, const char* fmt, ...);
     virtual void warn(const char* tag, int context_id, const char* fmt, ...);
     virtual void error(const char* tag, int context_id, const char* fmt, ...);
+// interface ISrsThreadHandler.
+public:
+    virtual int on_reload_log_tank();
+    virtual int on_reload_log_level();
+    virtual int on_reload_log_file();
 private:
     virtual bool generate_header(const char* tag, int context_id, const char* level_name, int* header_size);
-    static void write_log(int& fd, char* str_log, int size, int level);
+    virtual void write_log(int& fd, char* str_log, int size, int level);
+    virtual void open_log_file();
 };
 
 #endif
diff --git a/trunk/src/app/srs_app_reload.cpp b/trunk/src/app/srs_app_reload.cpp
index 16860da15..0747b395d 100644
--- a/trunk/src/app/srs_app_reload.cpp
+++ b/trunk/src/app/srs_app_reload.cpp
@@ -45,6 +45,21 @@ int ISrsReloadHandler::on_reload_pid()
     return ERROR_SUCCESS;
 }
 
+int ISrsReloadHandler::on_reload_log_tank()
+{
+    return ERROR_SUCCESS;
+}
+
+int ISrsReloadHandler::on_reload_log_level()
+{
+    return ERROR_SUCCESS;
+}
+
+int ISrsReloadHandler::on_reload_log_file()
+{
+    return ERROR_SUCCESS;
+}
+
 int ISrsReloadHandler::on_reload_pithy_print()
 {
     return ERROR_SUCCESS;
diff --git a/trunk/src/app/srs_app_reload.hpp b/trunk/src/app/srs_app_reload.hpp
index 6c50fe10d..f01c700a1 100644
--- a/trunk/src/app/srs_app_reload.hpp
+++ b/trunk/src/app/srs_app_reload.hpp
@@ -43,6 +43,9 @@ public:
 public:
     virtual int on_reload_listen();
     virtual int on_reload_pid();
+    virtual int on_reload_log_tank();
+    virtual int on_reload_log_level();
+    virtual int on_reload_log_file();
     virtual int on_reload_pithy_print();
     virtual int on_reload_vhost_added(std::string vhost);
     virtual int on_reload_vhost_removed(std::string vhost);
diff --git a/trunk/src/kernel/srs_kernel_log.cpp b/trunk/src/kernel/srs_kernel_log.cpp
index 055b3cba9..bfc4b09f2 100644
--- a/trunk/src/kernel/srs_kernel_log.cpp
+++ b/trunk/src/kernel/srs_kernel_log.cpp
@@ -38,15 +38,6 @@ int ISrsLog::initialize()
     return ERROR_SUCCESS;
 }
 
-int ISrsLog::level()
-{
-    return SrsLogLevel::Trace;
-}
-
-void ISrsLog::set_level(int /*level*/)
-{
-}
-
 void ISrsLog::verbose(const char* /*tag*/, int /*context_id*/, const char* /*fmt*/, ...)
 {
 }
diff --git a/trunk/src/kernel/srs_kernel_log.hpp b/trunk/src/kernel/srs_kernel_log.hpp
index 55682f7ea..b6c9b6e5a 100644
--- a/trunk/src/kernel/srs_kernel_log.hpp
+++ b/trunk/src/kernel/srs_kernel_log.hpp
@@ -68,11 +68,6 @@ public:
     */
     virtual int initialize();
 public:
-    /**
-    * defined in SrsLogLevel.
-    */
-    virtual int level();
-    virtual void set_level(int level);
     /**
     * log for verbose, very verbose information.
     */
diff --git a/trunk/src/main/srs_main_server.cpp b/trunk/src/main/srs_main_server.cpp
index 79fb138dd..23b7e5447 100644
--- a/trunk/src/main/srs_main_server.cpp
+++ b/trunk/src/main/srs_main_server.cpp
@@ -98,7 +98,6 @@ int main(int argc, char** argv)
     if ((ret = _srs_log->initialize()) != ERROR_SUCCESS) {
         return ret;
     }
-    _srs_log->set_level(srs_get_log_level(_srs_config->get_srs_log_level()));
     
     srs_trace("srs(simple-rtmp-server) "RTMP_SIG_SRS_VERSION);
     srs_trace("uname: "SRS_UNAME);