diff --git a/crates/otel/Cargo.toml b/crates/otel/Cargo.toml
index 33caeaad1..adc1d109d 100644
--- a/crates/otel/Cargo.toml
+++ b/crates/otel/Cargo.toml
@@ -25,6 +25,7 @@ opentelemetry-http = { workspace = true }
 opentelemetry-semantic-conventions = { workspace = true }
 opentelemetry = { workspace = true, features = ["metrics"] }
 salvo_core = { workspace = true, default-features = false }
+tracing = { workspace = true }
 
 [dev-dependencies]
 salvo_core = { workspace = true, features = ["test"] }
diff --git a/crates/otel/src/metrics.rs b/crates/otel/src/metrics.rs
index 18366d0e4..e2bd5ad97 100644
--- a/crates/otel/src/metrics.rs
+++ b/crates/otel/src/metrics.rs
@@ -63,7 +63,10 @@ impl Handler for Metrics {
         ctrl.call_next(req, depot, res).await;
         let elapsed = s.elapsed();
 
-        let status = res.status_code.unwrap_or(StatusCode::NOT_FOUND);
+        let status = res.status_code.unwrap_or_else(|| {
+            tracing::info!("[otel::Metrics] Treat status_code=none as 200(OK).");
+            StatusCode::OK
+        });
         labels.push(KeyValue::new(
             trace::HTTP_RESPONSE_STATUS_CODE,
             status.as_u16() as i64,
diff --git a/crates/otel/src/tracing.rs b/crates/otel/src/tracing.rs
index 21eced0c4..7cd9cf5a4 100644
--- a/crates/otel/src/tracing.rs
+++ b/crates/otel/src/tracing.rs
@@ -78,7 +78,10 @@ where
             let cx = Context::current();
             let span = cx.span();
 
-            let status = res.status_code.unwrap_or(StatusCode::NOT_FOUND);
+            let status = res.status_code.unwrap_or_else(|| {
+                tracing::info!("[otel::Tracing] Treat status_code=none as 200(OK).");
+                StatusCode::OK
+            });
             let event = if status.is_client_error() || status.is_server_error() {
                 "request.failure"
             } else {