Start office, click Help at the top, and then click Check for Updates.

But it may be the same as the result of patching in official website. I wonder if it will be checked.

What you said is vague, probably because you are using a retina screen. Many softwares before 13 don't support the display mode of retina screen, so even if you update the version, it may still be blurred. It is better to use the version after 13.