Hello Ehsan! Your grammar is fine, but watch your spelling and punctuation.
"I am studying for a Bachelor of science degree."
"[I am a] Bachelor student at Amirkabir University of Technology"
By the way your use of the word "true" isn't very natural here, it's much better to say "correct". "True" has a much broader meaning and can be subjective or open to interpretation. "Correct" is more appropriate for facts or something that's unquestionably right, eg. 1+1=2, or "The capital of Iran is Tehran".