How to move the shared documents between 2 different farm

Finally, I found a easy way to move the shared documents to another farm without lossing the versions, date, owner informations.
Here is the steps.

1. Create a temp sub-site based from publishing template group within the same web application of shared document.


2. Use [move] function to move all documents from [Shared Documents] list to temp sub-site. If want keep folder structure, create the same folder structure first and then move.
   [move] function can be found - [site action] - [site settings] - [Modify all site settings] - [Content and structure] - [Actions]


3. Use stsadm export/import to clone this sub-site to another farm.


4. Use reverse way to [move] all documents within sub-site to a new [Shared Documents] list.