Arefly

Log the Search Engine Robots Visits of your Webite.
取得搜索引擎的蜘蛛訪問網站的記錄
And you can find your log at http://YOUR_BLOG_URL/robots_log.txt
<h4>Translators</h4>
<ul>
<li>Chinese, Simplified (zh_CN) – <a href="http://www.arefly.com/" rel="nofollow ugc">Arefly</a></li>
<li>Chinese, Traditional (zh_TW) – <a href="http://www.arefly.com" rel="nofollow ugc">Arefly</a></li>
<li>English (en_US) – <a href="http://www.arefly.com" rel="nofollow ugc">Arefly</a></li>
</ul>
If you have created your own language pack, or have an update of an existing one, you can send <a href="https://codex.wordpress.org/Translating_WordPress" rel="nofollow ugc">gettext PO and MO files</a> to <a href="http://www.arefly.com/about/" rel="nofollow ugc">Arefly</a> so that I can bundle it into WP Robots Log. You can download the latest <a href="https://plugins.svn.wordpress.org/wp-robots-log/trunk/lang/wp-robots-log.pot" rel="nofollow ugc">POT file</a>.

WP Robots Log

Log the Search Engine Robots Visits of your Webite. 取得搜索引擎的蜘蛛訪問網站的記錄

modernwebstudios

This plugin add meta tag noindex,nofolow to head of any attachment page().

MWS Noindex Attachment Pages

This plugin add meta tag noindex,nofolow to head of any attachment page().

WP Robots Log vs MWS Noindex Attachment Pages