diff --git a/trunk/doc/CHANGELOG.md b/trunk/doc/CHANGELOG.md
index 83acf7ca3..96118be7c 100644
--- a/trunk/doc/CHANGELOG.md
+++ b/trunk/doc/CHANGELOG.md
@@ -8,6 +8,7 @@ The changelog for SRS.
 
 ## SRS 4.0 Changelog
 
+* v5.0, 2022-08-24, For [#2136](https://github.com/ossrs/srs/issues/2136): API: Cleanup no active streams for statistics. v4.0.256
 * v4.0, 2022-08-17, RTMP URL supports domain in stream parameters. v4.0.255
 * v4.0, 2022-08-10, Fix server id generator bug. v4.0.254
 * v4.0, 2022-06-29, Update SRS image for r.ossrs.net. v4.0.253
diff --git a/trunk/src/app/srs_app_statistic.cpp b/trunk/src/app/srs_app_statistic.cpp
index f03a41926..a8f6a8528 100644
--- a/trunk/src/app/srs_app_statistic.cpp
+++ b/trunk/src/app/srs_app_statistic.cpp
@@ -164,6 +164,11 @@ srs_error_t SrsStatisticStream::dumps(SrsJsonObject* obj)
 
 void SrsStatisticStream::publish(std::string id)
 {
+    // To prevent duplicated publish event by bridger.
+    if (active) {
+        return;
+    }
+
     publisher_id = id;
     active = true;
     
@@ -172,6 +177,11 @@ void SrsStatisticStream::publish(std::string id)
 
 void SrsStatisticStream::close()
 {
+    // To prevent duplicated close event.
+    if (!active) {
+        return;
+    }
+
     has_video = false;
     has_audio = false;
     active = false;
@@ -375,22 +385,6 @@ void SrsStatistic::on_stream_close(SrsRequest* req)
     SrsStatisticVhost* vhost = create_vhost(req);
     SrsStatisticStream* stream = create_stream(vhost, req);
     stream->close();
-    
-    // TODO: FIXME: Should fix https://github.com/ossrs/srs/issues/803
-    if (true) {
-        std::map<std::string, SrsStatisticStream*>::iterator it;
-        if ((it=streams.find(stream->id)) != streams.end()) {
-            streams.erase(it);
-        }
-    }
-    
-    // TODO: FIXME: Should fix https://github.com/ossrs/srs/issues/803
-    if (true) {
-        std::map<std::string, SrsStatisticStream*>::iterator it;
-        if ((it = rstreams.find(stream->url)) != rstreams.end()) {
-            rstreams.erase(it);
-        }
-    }
 }
 
 srs_error_t SrsStatistic::on_client(std::string id, SrsRequest* req, ISrsExpire* conn, SrsRtmpConnType type)
@@ -441,6 +435,40 @@ void SrsStatistic::on_disconnect(std::string id)
     
     stream->nb_clients--;
     vhost->nb_clients--;
+
+    cleanup_stream(stream);
+}
+
+void SrsStatistic::cleanup_stream(SrsStatisticStream* stream)
+{
+    // If stream has publisher(not active) or player(clients), never cleanup it.
+    if (stream->active || stream->nb_clients > 0) {
+        return;
+    }
+
+    // There should not be any clients referring to the stream.
+    for (std::map<std::string, SrsStatisticClient*>::iterator it = clients.begin(); it != clients.end(); ++it) {
+        SrsStatisticClient* client = it->second;
+        srs_assert(client->stream != stream);
+    }
+
+    // Do cleanup streams.
+    if (true) {
+        std::map<std::string, SrsStatisticStream *>::iterator it;
+        if ((it = streams.find(stream->id)) != streams.end()) {
+            streams.erase(it);
+        }
+    }
+
+    if (true) {
+        std::map<std::string, SrsStatisticStream *>::iterator it;
+        if ((it = rstreams.find(stream->url)) != rstreams.end()) {
+            rstreams.erase(it);
+        }
+    }
+
+    // It's safe to delete the stream now.
+    srs_freep(stream);
 }
 
 void SrsStatistic::kbps_add_delta(std::string id, ISrsKbpsDelta* delta)
diff --git a/trunk/src/app/srs_app_statistic.hpp b/trunk/src/app/srs_app_statistic.hpp
index 6a25c6ec7..4285f3ced 100644
--- a/trunk/src/app/srs_app_statistic.hpp
+++ b/trunk/src/app/srs_app_statistic.hpp
@@ -173,6 +173,10 @@ public:
     //      only got the request object, so the client specified by id maybe not
     //      exists in stat.
     virtual void on_disconnect(std::string id);
+private:
+    // Cleanup the stream if stream is not active and for the last client.
+    void cleanup_stream(SrsStatisticStream* stream);
+public:
     // Sample the kbps, add delta bytes of conn.
     // Use kbps_sample() to get all result of kbps stat.
     virtual void kbps_add_delta(std::string id, ISrsKbpsDelta* delta);
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index 5443b9c32..0ecbf255e 100644
--- a/trunk/src/core/srs_core_version4.hpp
+++ b/trunk/src/core/srs_core_version4.hpp
@@ -9,6 +9,6 @@
 
 #define VERSION_MAJOR       4
 #define VERSION_MINOR       0
-#define VERSION_REVISION    255
+#define VERSION_REVISION    256
 
 #endif