diff --git a/server/src/core/web.go b/server/src/core/web.go
index 92f1948..18fb369 100644
--- a/server/src/core/web.go
+++ b/server/src/core/web.go
@@ -12,6 +12,9 @@ var errSkip = errors.New(`skip`)
 // WebHandle ...
 func (c *Core) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
+	metrics.ReqConcurrentInc()
+	defer metrics.ReqConcurrentDec()
+
 	p, err := req(w, r)
 	if err != nil {
 		if err != errSkip {
diff --git a/server/src/metrics/http.go b/server/src/metrics/http.go
index cdad3d2..b51e3de 100644
--- a/server/src/metrics/http.go
+++ b/server/src/metrics/http.go
@@ -7,10 +7,16 @@ import (
 )
 
 var (
-	reqCount     = newCounter(`orca_req_count`, `HTTP 请求次数`)
-	reqFailCount = newCounter(`orca_req_fail_count`, `无法响应的 HTTP 请求数`)
-	reqBytes     = newCounter(`orca_req_bytes`, `文件总上传量`)
-	errorCount   = prometheus.NewCounterVec(
+	reqCount      = newCounter(`orca_req_count`, `HTTP 请求次数`)
+	reqFailCount  = newCounter(`orca_req_fail_count`, `无法响应的 HTTP 请求数`)
+	reqBytes      = newCounter(`orca_req_bytes`, `文件总上传量`)
+	reqConcurrent = prometheus.NewGauge(
+		prometheus.GaugeOpts{
+			Name: `orca_req_concurrent`,
+			Help: `当前并发请求数`,
+		},
+	)
+	errorCount = prometheus.NewCounterVec(
 		prometheus.CounterOpts{
 			Name: `orca_error_code`,
 			Help: `API 返回报错`,
@@ -24,6 +30,16 @@ func ReqFailCount() {
 	reqFailCount.Inc()
 }
 
+// ReqConcurrentInc ...
+func ReqConcurrentInc() {
+	reqConcurrent.Inc()
+}
+
+// ReqConcurrentDec ...
+func ReqConcurrentDec() {
+	reqConcurrent.Dec()
+}
+
 // ReqBytes ...
 func ReqBytes(n int) {
 	reqCount.Inc()
diff --git a/server/src/metrics/init.go b/server/src/metrics/init.go
index a3e9f1e..9e68b39 100644
--- a/server/src/metrics/init.go
+++ b/server/src/metrics/init.go
@@ -6,6 +6,8 @@ func init() {
 	prometheus.MustRegister(reqCount)
 	prometheus.MustRegister(reqFailCount)
 	prometheus.MustRegister(reqBytes)
+	prometheus.MustRegister(reqConcurrent)
+
 	prometheus.MustRegister(errorCount)
 
 	prometheus.MustRegister(rspBytes)