Disclosed are a method and a device for generating a filled pause detection model using a small amount of speech data included in a new domain in a 5G communication environment by executing artificial intelligence (AI) algorithms and/or machine learning algorithms provided therein. According to the present disclosure, the filled pause detection model generating method for a new domain may include constructing a filled pause detection model for the new domain, determining the initial model parameter for the filled pause detection model for the new domain by combining model parameters for filled pause detection models of a plurality of existing domains, and training the filled pause detection model of the new domain in which initial model parameter is set, using speech data from the new domain as training data.