先跟原廠的 source 比對 sha1 跟檔案大小............
如果找不到資料或是對不上勸你就別用............

看版號：Office_2013_ProPlus-SP1，ＭＳＯ版號15.0.4569.1506
應該已是 SP1沒錯了！

感謝兄台熱心回覆 剛剛又看到一版不一樣的
請問MSO版號：15.0.4745.1000是否比上面那版已是SP1的還新

補充來自 M$官網的說明：
1.How to determine the service pack level of your Office 2013 suite
To determine whether a service pack has been applied to your Microsoft Office 2013 suite, just check the version number:
Version number of the original RTM release of Office 2013: 15.0.4420.1017
Version number of Office 2013 Service Pack 1 (SP1): 15.0.4569.1506 or later
請參見：
https://support.microsoft.com/en-us/kb/2951141


2.August 11, 2015, update for Office 2013 (KB3055017)
．To apply this update, you must have Microsoft Office 2013 Service Pack 1 installed.
(要套用此更新，必須已安裝為 MSO 2013 SP1)
．To determine whether your Office installation is Click-to-Run or MSI-based, follow these steps:
Start an Office 2013 application, such as Microsoft Word 2013.
On the File menu, click Account.
For Office 2013 Click-to-Run installations, an Update Options item is displayed.
(安裝此 KB3055017後, Office版號將顯示為 15.0.4745.1000)
請參見：
https://support.microsoft.com/en-us/kb/3055017

感謝大大熱心地幫忙搜尋爬文分享 看來目前Office 2013 SP1更新後的版號應該就是15.0.4745.1000囉。