Is this my screen problem?

Appear from this angle, plus working remotely, is looks like some type of inconsistent illumination of the screen at the very bottom edge.

1 - Suggest restarting in Safe Mode. This will perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts. The boot up will be slow and can take some time -Normal.

2 - Does the issue present in this mode ?

Take a screenshot. Does it appear in a screenshot?

A display/screen problem will not show in a screenshot.

That would indicate a screen/display problem.

augustine0526 wrote:

it does not appear in screenshot~~

Agree with previous posting.

Suggest making an appointment with an Apple Authorized Service Centre or Genius Bar and and the computer Evaluated.

You are welcome and thank you too.

Do come back to the Apple Support Communities ( ASC )  in the future, if / or when additional question may arise