@scaaahu: your answer exactly what i'm asking for. But I just want to know the situation in some other education systems like Japanese or France. In Vietnam (and also in Asia, I think), professor is not just a job. Professors are respected by all people in the social, not just by their students. I think "professor" is actually a rank of teaching job in Vietnam, but the person who hold that title would hold it for the entire of his or her life. After retiring from the university, he or she is still addressed as "professor". And the title is recognized by every university in the country.

@ff524: I meant the title, not the job. If you get a teaching job in a university in Vietnam, you're a lecturer. After quite many years, if your contribution is enough, a council from government will judge and determine to give you the title.

I'm sorry if I used the wrong word. I mean to "promote a person as professor". So you mean that in your country, the title is bestowed/promoted by the institute/university? And you are legally a professor in your institute. But in Vietnam you just cannot do that. No one considers you as professor.

Of course I didn't expect you give me the answer for every country. But what about your country and some country, or some academic system you know?