I got a super useful snippet from org-hacks: http://orgmode.org/worg/org-hacks.html#unnumbered-66, which can automatically adjust the position of tags to right of the headline and make org-mode looks cleaner.
But since these days, I start to use visual-line-mode, an uncomfortable looks problems appeared. On the folded headline, the tags are wrapped strangely to below the headline, like wrapped to a new line. However, when I unfold the headline, the tags go to the right position, of course, the rightest of the headline. So what is the problem? Since the tags can move according to the windows size, why it can not go well when headline is folded?