diff --git a/MdeModulePkg/Include/Guid/CapsuleVendor.h b/MdeModulePkg/Include/Guid/CapsuleVendor.h
index a97a9b546c..8ac5d0cf46 100644
--- a/MdeModulePkg/Include/Guid/CapsuleVendor.h
+++ b/MdeModulePkg/Include/Guid/CapsuleVendor.h
@@ -37,4 +37,12 @@ Abstract:
 
 extern EFI_GUID gEfiCapsuleVendorGuid;
 
+//
+// Data structure of capsule guid hob 
+//
+typedef struct {
+  EFI_PHYSICAL_ADDRESS BaseAddress;
+  UINT32 Length;
+} CAPSULE_HOB_INFO;
+
 #endif // #ifndef _EFI_CAPSULE_VENDOR_GUID_H_
diff --git a/MdeModulePkg/Include/Library/CapsuleLib.h b/MdeModulePkg/Include/Library/CapsuleLib.h
new file mode 100644
index 0000000000..b8691bc4ab
--- /dev/null
+++ b/MdeModulePkg/Include/Library/CapsuleLib.h
@@ -0,0 +1,47 @@
+/** @file
+  Capsule Library. This library class defines a set of interfaces on 
+  how to process capusle image update.
+
+  Copyright (c) 2007, Intel Corporation
+  All rights reserved. This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+  
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __CAPSULE_LIB_H__
+#define __CAPSULE_LIB_H__
+
+/**
+  Those capsules supported by the firmwares.
+  
+  @retval EFI_SUCESS       Input capsule is supported by firmware.
+  @retval EFI_UNSUPPORTED  Input capsule is not supported by the firmware.
+**/
+EFI_STATUS
+EFIAPI
+SupportCapsuleImage (
+  IN EFI_CAPSULE_HEADER *CapsuleHeader
+  )
+;
+
+/**
+  The firmware implements to process the capsule image.
+  
+  @retval EFI_SUCESS       Process Capsule Image successfully. 
+  @retval EFI_UNSUPPORTED  Capsule image is not supported by the firmware.
+**/
+EFI_STATUS
+EFIAPI
+ProcessCapsuleImage (
+  IN EFI_CAPSULE_HEADER *CapsuleHeader
+  )
+;
+
+#endif
+
+