Albert Einstein one of the greatest minds of all times who rocked the world which his theory of relativity to change our understanding of the universe.
是什麼意思

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I think some commas would help, but you are right that there’s a bit missing off the main clause 😆 so it’s not a complete sentence as it is.

If the main clause is “Albert Einstein was a man” then “one of the greatest minds of all times”, “who rocked the world with his theory of relativity” and “to change our understanding of the universe” are all clauses which add extra info.

You could therefore have this:
Albert Einstein, one of the greatest minds of all times, who rocked the world with his theory of relativity, to change our understanding of the universe, was a man.

Or this:

Albert Einstein, one of the greatest minds of all times, who rocked the world with his theory of relativity, changed our understanding of the universe.
(So the main clause is: Albert Einstein changed our understanding of the universe)