Adolf Bernhard Marx(May 25,1795-May 17,1866)was German music critic,theorist,and educator during the 19th century.The term "Musik Idee” (music idea)was first coined in Marx's review of Beethoven's Third Symphony(Hero)in the Berliner allgemeine musikalische Zeitung (1824-1830). Numerous composers,including Mendelssohn, Liszt, and Schoenberg have inspired from both Marx's Musik Idee and the Berliner allgememeine musikalische Zeitung for their compositions and musical ideas.This paper will discuss Marx's founding of the Berliner allgememeine musikalische Zeitung and his “Musik Idee” in detail,with the aim of further clarifying the concept of “Musik Idee” as well as Marx's interpretation and acceptance of Beethoven's music.