The present invention provides a method for realizing a message interaction and a converged service system, wherein the method includes: the converged service system receiving a first message sent by a converged service terminal and a first identifier of the first message, and forwarding the first message to the traditional message system (S402); the converged service system establishing a first corresponding relationship between a pre-designated second identifier carried in a second message sent by the traditional message system and the first identifier, or establishing a second corresponding relationship between a second identifier sent, in response to the first message, by the traditional message system and the first identifier (S404); and in the case of receiving the second message carrying the second identifier sent by the traditional message system, the converged service system processing the second message according to the first corresponding relationship or the second corresponding relationship (S406).
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