I have installed ms office.Now i want to remove it from my computer,I removed other tools but couldn't remove ms-exel and ms-word.when I click to remove in my add or remove programs' list,it says "The language type is not supported by your system",I also used ccleaner to remove,but couldn't get success.please help me?

How much do you need to get rid of?
You can just delete the office file from program files and any reference to office in the start menu. There will still be a large residue of office but it should not bother you.
If you wanted to go further (Not recommended) you could back-up your register, regedit, find all references to office and delete them all.