Thanks for your quick reply and big help.
If I have new F1 transfer success and then My I-485 is denied because of age out. The F1 will be denied because of immigration tendent?
-No. The problem is that USCIS will not approve your F1 due to your immigration intent. if they approve your f1 ACCIDENTLY, your approved F1 status will be OK.
or I can be F1 still stay in US?
-yes.
Could I apply OPT after college graduation? If I do OPT, Any effect to 485?
-Same problem as your f1 application for the new study.