Thank the spirits we have a Chinese guy in our team
. I'd have a pretty hard time trying to translate and even Google translate doesn't do a good job. Suggestion to the OP, does not matter at all that your English is not that good, use Google translate for starters to translate what you want to communicate to the forums. LQ users are pretty patient people and will try to help even if your English is way off, but there are very little people here that would understand your language I assume.
What did you install first? Windows or Ubuntu? You could use a tool like Super Grub Disk
to try and repair your boot record.