Apparatus, method and system for generating a threshold for utterance verification are introduced herein. When a processing object is determined, a recommendation threshold is generated according to an expected utterance verification result. In addition, extra collection of corpuses or training models is not necessary for the utterance verification introduced here. The processing unit can be a recognition object or an utterance verification object. In the apparatus, method and system for generating a threshold for utterance verification, at least one of the processing objects is received and then a speech unit sequence is generated therefrom. One or more values corresponding to each of the speech unit of the speech unit sequence are obtained accordingly, and then a recommendation threshold is generated based on an expected utterance verification result.