This paper proposes a new computational method for comprehending attributional metaphors. The proposed method generates deeper interpretations of metaphors than other methods through the process of figurative mapping that transfers affectively similar features of the source concept onto the target concept. Any features are placed on a common two-dimensional space revealed in the domain of psychology, and similarity of two features is calculated as a distance between them in the space. A computational model of metaphor comprehension based on the method has been implemented in a computer program called PROMIME (PROtotype system of Metaphor Interpreter with MEtaphorical mapping). Comparison between the PROMIME system's output and human interpretation shows that the performance of the proposed method is satisfactory.