You should check this link: http://nonsolocultura.studenti.it/le-migliori-accademie-di-belle-arti-in-italia-187457.html Literally "academy of illustration" is "accademia di illustrazione", but you better look for "accademia di belle arti". If you don't understand something in the article above, just tell me and I'll try to explain in English.

i just want a good academy for study , city is not important for me

In which part of Italy?