1969 - 71 - studied musicology at the Faculty of Philosophy at the Charles University
1972 - 77 - studied composition at the Music Faculty of the Academy of Performing Arts in Praha
1974 participated at the composers's master courses in Siena (L'Accademia Musicale Chigiana)
1978 - 79 theory of music - Academy of Music in Prague (as a postgraduate)
1976 - 86 teacher of music theory at the Deyl's Conservatory in Prague
1986 - (up to now) teacher at the Musicological Institute of the Charles University in Prague (2002 Ph.D.)
1995 - (up to now) lecturer on music theory and composition at the Prague Conservatory
2006 - was appointed docent for music theory and education at the Jan Evangelista Purkyne University in Usti nad Labem

Eduard Douša work was influenced from the very beginning by the European and Czech music tradition of the first half of the 20th century (Bartók, Britten, Hindemith, Borkovec, Krejci, Martinù).
He considers that the most important attribute in music is understandable form and harmony, alongside the expressive melody. He often composes for concrete musicians - e.g. violonist Jaroslav Svecený, trumpet players Vladimír Rejlek, or M. Laštovka, Panocha Quartet, Apollon Quartet, Bohemia Saxophone Quartet, his wife, pianist Eva Benesova, violoncellist Vladan Koci etc. As a musicologist and lecturer he is focused on Czech music of the 20th century. He is a member of the board of directors of the OSA Foundation, and a committee member of the Association of Contemporary Music 'Přítomnost'.