Disclosed is a system and method for conversation practice in simulated situations. The system comprises situational conversation teaching material, an audio processing module and a conversation processing module. The teaching material consists of multi-flow conversation paths and conversational sentences with a plurality of replaceable vocabulary items. According to different contents of the situational conversation teaching material and biased data of the teaching material, the audio processing module dynamically adjusts speech recognition model and recognizes the inputted audio signal of the learners to determine the information on the recognition results. The conversation processing module determines the information in response to the learners, based on the information on the recognition results, the situational conversation teaching material and biased data of the teaching material.