Hi. Can you right click on Deepin desktop, which should give option to display settings? When you move the mouse cursor to  bump the lower right corner of the desktop screen, does the control center come up? And when you launch your apps, you cannot find the control center app? Have you tried rebooting into Deepin recovery mode?

Hi Stevex, I have done every thing you said, it just didn't work.

the control center just DISAPPEAR! And I noticed the clock in the right corner also was gone. I wonder if some system file have been deleted.

In Deepin not been tested !!!
Try to come with a different console (Ctrl_Alt_F2) and remove personal configs. After a new entry on your desktop, you will lose the settings, but not OS.
Good Luck!

simply try reinstalling the deepin os

Edited by tristar at 2016-8-11 08:32

create new user and see if you have same problem, if not, then use new user as main, if yes, then reinstall deepin, or as is com_bvv suggested, move to terminal with ctrl+at+f1/f2...etc. and remove from /home/username/.config all deepin maps, and if this is not working for you, reinstall deepin as suggested by bumkailashkumar.