Medical Vision is a technology to measure and visualize a human body non-invasively. Among the medical vision technologies, functional magnetic resonance imaging (fMRI) is one of the advanced tools to evaluate human linguistic function which is indispensable for qualified life. By listening of comprehensive but non-native language, activation representing enhanced semantic and syntactic processing was observed, although only augmentation of phonological processing was observed by non-comprehensive language (Fig.1). In an experiment of cocktail party phenomenon, cooperation among sound source detection, phonological processing and semantic processing for selective auditory attention was indicated (Fig2).