diff --git a/develop/doc/api/v2/config/layer.html b/develop/doc/api/v2/config/layer.html
index 8253ce86f883a339508711d5b8997dadb2860386..6eaa3f8156737d8bb6bf4fd716cb2f12453bad2c 100644
--- a/develop/doc/api/v2/config/layer.html
+++ b/develop/doc/api/v2/config/layer.html
@@ -4117,8 +4117,8 @@ paddle.v2.attr.ExtraAttribute for more details.</li>
 <dt>
 <em class="property">class </em><code class="descclassname">paddle.v2.layer.</code><code class="descname">detection_output</code></dt>
 <dd><p>Apply the NMS to the output of network and compute the predict bounding
-box location. The output of this layer could be None if there is no valid
-bounding box.</p>
+box location. The output&#8217;s shape of this layer could be zero if there is
+no valid bounding box.</p>
 <table class="docutils field-list" frame="void" rules="none">
 <col class="field-name" />
 <col class="field-body" />
diff --git a/develop/doc_cn/api/v2/config/layer.html b/develop/doc_cn/api/v2/config/layer.html
index dcb9e16e6ece8290ef5e369b5bd9a57851b915ab..c06d77a07fa0604c304c4e00fc3889b8150542dc 100644
--- a/develop/doc_cn/api/v2/config/layer.html
+++ b/develop/doc_cn/api/v2/config/layer.html
@@ -4124,8 +4124,8 @@ paddle.v2.attr.ExtraAttribute for more details.</li>
 <dt>
 <em class="property">class </em><code class="descclassname">paddle.v2.layer.</code><code class="descname">detection_output</code></dt>
 <dd><p>Apply the NMS to the output of network and compute the predict bounding
-box location. The output of this layer could be None if there is no valid
-bounding box.</p>
+box location. The output&#8217;s shape of this layer could be zero if there is
+no valid bounding box.</p>
 <table class="docutils field-list" frame="void" rules="none">
 <col class="field-name" />
 <col class="field-body" />