Bajić himself was a teacher at both the Central Elementary School and the Serbian Grand Orthodox Gymnasium in Novi Sad (today known as Jovan Jovanović Zmaj Gymnasium), prepared sermons for the occasion of Saint Sava Day in the Lyceum, led three choirs and the singing society Neven, and collaborated on various musical aspects of Serbian National Theater productions.

Realizing all of this, Isidor Bajić announced his intention to the public after an initial period of pondering, consulting, and planning: The Music School (Conservatory) will be open in Novi Sad in September.

Our town as well as our children will benefit, as our young generations will have the opportunity to be musically educated by professional musicians, further propelling the cultural progress of this city.

The beginning of the First World War and the early death of Isidor Bajić interrupted this progress and resulted in a temporary closing of the School on 15 September 1915.

After the Second World War, and upon the proposal of the Local Command Office of the Department of Education, Milutin Ružić was hired to organize and gather teachers so that Music School Isidor Bajić might again begin its work.

An experienced staff was joined with and strengthened by the addition younger colleagues, and many other diligent, highly professional, and devoted music pedagogues who ushered in a successful new period in the School's operation.

[5][13] In 2004, the school and the principal received the New Millennium Award for the Best Trade Name in Madrid for successful work and management in the field of musical education and culture.