How to ignore system input method when using shortcuts prefixed with C-x or C-c?

How to ignore system input method when using shortcuts prefixed with C-x
or C-c?

Env: OS X 10.8.5
Emacs ver: GNU Emacs 24.3
I'm using the system Chinese input method and found it's very inconvenient
when using shortcuts like C-x or C-c. It will print the words on current
buffer.