A method for providing an explanation for patient state prediction and an electronic apparatus therefor are disclosed. The method includes acquiring time-series data on a patient, acquiring, from an artificial intelligence-based prediction model, a prediction result that is output by the prediction model based on the time-series data, acquiring, from an explainable artificial intelligence-based explanation model, explanation data that is output by the explanation model based on the time-series data and the prediction result, inputting input data including the time-series data, the prediction result, and the explanation data to an artificial intelligence-based language model, and acquiring, from the language model, natural language text data that is output by the language model based on the input data and includes a reasoning basis of the prediction model for the prediction result.