diff --git a/monitor-entry/proxy-reader.go b/monitor-entry/proxy-reader.go
index 5a711d69..e0a204ce 100644
--- a/monitor-entry/proxy-reader.go
+++ b/monitor-entry/proxy-reader.go
@@ -43,7 +43,11 @@ func ReadProxy(ctx http_context.IHttpContext) []IPoint {
 		"node":       globalLabels["node_id"],
 	}
 	for key, label := range labels {
-		labelMetrics[key] = ctx.GetLabel(label)
+		value := ctx.GetLabel(label)
+		if value == "" {
+			value = "-"
+		}
+		labelMetrics[key] = value
 	}
 
 	for _, key := range proxyRequestMetrics {
diff --git a/monitor-entry/request-reader.go b/monitor-entry/request-reader.go
index 53668ae2..24a563d9 100644
--- a/monitor-entry/request-reader.go
+++ b/monitor-entry/request-reader.go
@@ -38,7 +38,11 @@ func ReadRequest(ctx http_context.IHttpContext) []IPoint {
 	}
 
 	for key, label := range labels {
-		tags[key] = ctx.GetLabel(label)
+		value := ctx.GetLabel(label)
+		if value == "" {
+			value = "-"
+		}
+		tags[key] = value
 	}
 	for _, metrics := range requestMetrics {
 		f, has := request[metrics]