This is known as "dual intent" 回複：使用AP會不會讓H1B無效

Q : Can an H-1B alien intend to immigrate permanently to the U.S.?

Yes. An H-1B alien can be the beneficiary of an immigrant visa petition, apply for adjustment of status, or take other steps toward Lawful Permanent Resident status without affecting H-1B status. This is known as "dual intent" and has been recognized in the immigration law since passage of the Immigration Act of 1990. During the time that the application for LPR status is pending, an alien may travel on his or her H-1B visa rather than obtaining advance parole or requesting other advance permission from Immigration to return to the U.S.

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Q : Can an H-1B alien intend to immigrate permanently to the U.S.?