Estonian Symphony Orchestras Association was founded in 1999 and it operated for a couple of years, organizing national youth symphony orchestra days, festivals, concerts etc. In March 2010 the association was re-established. At the moment the union consists of 28 youth symphony and string orchestras. In 2011 the association helped to organize symphony orchestras concert during Youth Song Festival. On the eve of festival the union organized a successful concert on the rooftop of Viru Center at the Rooftop Cinema. In February 2012, the union organized youth orchestras concert at The House of the Blackheads. In addition, there have been many work-shops, seminars and info-evenings for members and others in Viljandi and Tallinn. On 21st of April 2013, in Narva, was organized a big concert for youth orchestras, which ended with a performance of orchestra consisting of 160 young musicians. 

So far the biggest event the union has organized was definately in spring 2012 the 9th European Orchestra Festival with over 700 amateur and youth orchestra musicians from 12 European countries and 26 different orchestras. Participants attended work-shops, about different styles of music, carried out by professional conductors. During the festival were held 8 concerts and a grandiose final concert in the Freedom Square in Tallinn. Organizing this big international event brought in a lot of positive feedback and got attention in Estonian musical life. In cooperation with Eesti Kontsert and Baltic Arts Workshop the festival was supervened by tour of orchestras in St. Petersburg with concerts in famous music halls, for example St. Petersburg State Conservatory Music Hall.

Concerts and youth orchestra festivals were held in 2014 and 2015 in Tallinn, Valga, Paide and PƤrnu. The association has founded 3 youth orchestras, Tallinn University Symphony Orchestra, Livonia Youth Orchestra and Narva Youth Symphony Orchestra. Since 2013 in every Spring the association organizes youth orchestra concerts in Tallinn Town Hall Square in Old Town Days Festival, in 2015 even 12 orchestras performed there during 3 days.

The union consists of 28 youth symphony and string orchestras.
The main objectives of the union are arranging festivals, concerts, work-shops and other events, advocating learning of orchestra instruments, exchanging repertoire and information, participation in international projects, dealing with Song Festival orchestras repertoire and founding new orchestras.