Click on the drop-down window top-right of the Paragraph Styles palette.
Click on “Load Paragraph Styles”.
Locate the InDesign document from which you wish to copy the paragraph style and double-click on the file name.
The “Load Styles” window will open. Locate the paragraph style(s) you want from the list and check the box. Click “OK”.
That’s it. Please note – if you’re loading a Paragraph Style that has an identical name to one in your current document, it will replace the existing Paragraph Style. It will also automatically reformat all the text in your document that uses that paragraph style.
Chinese for “Load Paragraph Styles” is “载入段落样式”
Read more: http://www.ehow.com/how_6072945_copy-one-document-adobe-indesign.html#ixzz31fJcvw20