diff --git a/docs/_static/multi-ota-urls.gif b/docs/_static/multi-ota-urls.gif
new file mode 100644
index 00000000..ebd878a3
Binary files /dev/null and b/docs/_static/multi-ota-urls.gif differ
diff --git a/docs/_static/single_ota_url.gif b/docs/_static/single_ota_url.gif
new file mode 100644
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Binary files /dev/null and b/docs/_static/single_ota_url.gif differ
diff --git a/docs/en/api-guides/fota-from-old-new.rst b/docs/en/api-guides/fota-from-old-new.rst
index 4382ab29..d5ca61dc 100644
--- a/docs/en/api-guides/fota-from-old-new.rst
+++ b/docs/en/api-guides/fota-from-old-new.rst
@@ -41,6 +41,20 @@ When FOTA completing, the partition map may look like the following graph (what
 
 In this case, there are about 40KB(4KB + 16KB + 4KB + 16KB) flash size cannot be used by users.
 
+FOTA by Single Firmware URL
+---------------------------
+
+|single_ota_url|
+
+.. |single_ota_url| image:: ../../_static/single_ota_url.gif
+
+FOTA by Multi Firmware URLs
+---------------------------
+
+|multi-ota-urls|
+
+.. |multi-ota-urls| image:: ../../_static/multi-ota-urls.gif
+
 Workflow
 ========