Method and system for realizing word coloring ring back tone based on coloring ring back tone platform

The invention discloses a method and a system for realizing word coloring ring back tone based on a coloring ring back tone platform. The system comprises a word coloring ring back tone platform, the coloring ring back tone platform, a calling MSC and a called MSC; and the method comprises the following steps that: a calling user dials a called user; when the calling MSC switches the calling to the coloring ring back tone platform to which the called user belongs according to the coloring ring back tone marking SSCODE of the called user, the calling MSC continuously notifies a calling event to the word coloring ring back tone platform; the word coloring ring back tone platform extracts corresponding word coloring ring back tone information according to subscription information of the called user and deliveries the word coloring ring back tone information to a calling user mobile phone terminal; and the calling user mobile phone terminal displays the word coloring ring back tone information delivered by the wo