With 7 years old learn to play mandolim with his father. During the teenage years take part on several rock bands such as Xarhanga and Petrus Castrus, with whom records four albuns.
From his 20's (on the year of the April 74's revolution) till his 30's, collaborates - in concert and records - with the most important composers of Portugal, highlighting his collaboration with José Afonso - since 1979 - with whom he collaborates regularly playng in several countries of the world and co-producing his last records.
In 1981 releases the album Cavaquinho, a work that opened new doors to the portuguese music, entirely instrumental, result of a long investigation - winning all the music awards of Portugal - beggining his way as instrumentist.
From 1983 till 2003 edits regularly the following records, some of them awarded: Braguesa 1983, Nortada 1983, Cadoi 1984, Os sete instrumentos 1986, Miradouro 1987 Janelas Verdes 1990, O meu Bandolim 1991, Acústico 1994, Lau Eskutara 1995 (recorded on the Basque Country with Kepa Junkera), Rituais 2000 (that was the basis to the choreography with the same name, of Rui Lopes Graça and the ballet dancers of Companhia Nacional de Bailado), and Faz-de-conta 2003 (the first multimedia cd for children in Portugal).
Performes in several concerts around the world, produces, orchestrates and participates as multi-instrumentist in multiple albuns of other authors and collaborates, at the same time with several names of music, such as: Kepa Junkera, Pete Seeger, Mestisay and The Chieftains - with whom records the album Santiago that won a Grammy Award in 1995.
In 2006 collaborates on the film Fados, from Carlos Saura, with Chico Buarque and Carlos do Carmo, producing the theme Fado tropical".
Still with the Mandolin, records in 2008 the album Geografias and In 2010 releases the album Graffiti, a song's album that counts with the participation of singers of different countries: Dulce Pontes, Maria João, Sara Tavares, Olga Cerpa (Spain), Nancy Vieira (Cape Verde) e Luanda Cozetti (Brazil).
For all concerts made during this years, stands out the one he directs on Théâtre de la Ville in Paris (2012), a tribute to José Afonso with current artists as António Zambujo, Mayra Andrade, João Afonso, etc
In 2013 he turns to cavaquinho and records the albun Cavaquinho.pt as a star for a new stage, focused on this instrument. For this, he constitutes the Cultural Association Museu Cavaquinho that aims to document, preserve and promote the history and practice of this instrument.
Júlio Pereira has 20 author albuns and participates as instrumentist, music director or producer in about 80 albuns of other artists.