This study aims at clarifying the mental manipulation process of words which change phoneme in alteration according to phonemic chain circumstances and is looking for methodologies with the consideration of types of alteration. The most effective way of the learning of foreign language is "Maximal application in way of the Minimal strategy". Hereupon this maxim, the learning way of words which are under general and necessary rule is the most effective for learner to accept indirect link with the reference to department of phoneme than the other ones. The learning way of words which are under restrictive and necessary rule is the most effective for learner to accept direct link between the individual form and individual phoneme. the learning way of the words which are under general and optional rule or restrictive and optional rule are effective to accept neither direct link nor indirect link because the changed phoneme is not acknowledged as the standard language except learners who have particular purpose and is exposed to particular surroundings. (Daegu University)