diff --git a/src/SUMMARY.md b/src/SUMMARY.md
index 2afd2e0..2bbeef5 100644
--- a/src/SUMMARY.md
+++ b/src/SUMMARY.md
@@ -1,3 +1,5 @@
 # Summary
+# Ceph의 data flow
 
-- [Architecture](./architecture.md)
+![Ceph Data Flow](./ceph data flow.png)
+- [Architecture](./architecture.md)
\ No newline at end of file
diff --git a/src/ceph data flow.png b/src/ceph data flow.png
new file mode 100644
index 0000000..5fa48fc
Binary files /dev/null and b/src/ceph data flow.png differ