Solved by install system fonts.

@strunkie30 Hi, I'm using this module and got the same question as you mentioned.

I'm not clear about "install system fonts", is that meaning that I should install fonts using in my HTML file on my server(CentOS)?

The PDF printer can't print your document because a clean CentOS installation does not include fonts.
Windows and OSx has by default some fonts installed: https://en.wikipedia.org/wiki/List_of_typefaces_included_with_OS_X

You can find multiple fontpacks on the internet for CentOS:
http://www.itzgeek.com/how-tos/linux/centos-how-tos/how-to-install-microsoft-truetype-fonts-in-centos-6-rhel-6.html#axzz3hGwfK1Gw

If you are using custom fonts from Google fonts or Typekit you can append them normaly, your fonts will be rendered fine. But Arial is not included in CentOS.

Sorry for my bad english 😄

@strunkie30 thanks for answering

@strunkie30

Thanks, I've solve the problem by

yum install cjkuni-ukai-fonts 

Although the fonts looks a little strange, maybe I should find another fonts 😃

There's an install script for microsoft fonts:
https://github.com/marcbachmann/dockerfile-phantomjs2/blob/master/Dockerfile#L4-L7