The musician died on Tuesday at his home in Baden-Baden, Germany his family said, reported BBC.
"For all those who met him and were able to appreciate his creative energy, his artistic vigour... Will remain alive and strong," the family said.
Boulez was also known as the head of the Paris Philharmonic, a cultural institution in Paris that combines spaces all dedicated to music.
He was the founder and former director of the Paris based Institut de Recherche et Coordination Acoustique/Musique and was also famed for his work alongside leading experimental composers such as Karlheinz Stockhausen and Olivier Messiaen.
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Born in the Loire region of France in 1925, Boulez began his musical career at the Conservatoire in Paris, one of the world's most celebrated music schools.
In 1945, he became musical director of the theatre company of Jean-Louis Barrault and Madeleine Renaud.
During this period, he composed violent early pieces such as his first two piano sonatas and Livre Pour Quatuor for the string quartet.
He also began acting as guest conductor for some of Europe's leading orchestras and festivals.
Boulez's talent led him to be more and more in demand and by the 1960s he was appearing widely as a conductor, going on to become chief conductor of the BBC Symphony Orchestra and New York Philharmonic Orchestra.
In 1996 he won a Grammy for his recording of Debussy's "La Mer" with the Cleveland Orchestra, and won again in 2002 for Boulez Conducts Varese (Ameriques; Arcana; Deserts; Ionisation) with the Chicago Symphony Orchestra.