I set a subdomain of my site: img.harryliu.org and moved all the upload files to the directry /public_html/img;
However i must to change the set in the wordpress background set.
PS: The version 3.9.1 wordpress hide these options of file upload. But there is a plugin named 'display file upload' can display these options.
Use CND to improve the loading speed.
I registered 七牛云存储（qiniund.com) which could improve the website loading speed through mirro your site. Set it like this:
Search and install "七牛云镜像for wordpress“ plugin, and set like this:
Change all the googleapis link to useso. Then the google's resouse will replace by 360's.