The purpose of this study is to determine the therapeutic stages in Guided Imagery and Music (GIM) by analyzing the symbolic meaning of the imagery as a music response effect and emotional transformation and, thereby, to provide more effective GIM services to people with mental health problems. In order to shed light on the therapeutic stages, Q Methodology, a subjectivity research method, was applied. Q samples were drawn by interviewing twenty GIM-experienced P samples (two male and eighteen female clients age 26-61 with mental health problems). After analyzing the Q sort with the QUANL program, the following four types were found: the first stage was the ‘perception and avoidance stage’ (4th type); the second stage was the ‘hopeful transition stage’ (3rd type); the third stage was the ‘transformation stage’ (2nd type); and the fourth stage was the ‘harmonious integration stage’ (1st type). The results indicate that there exist therapeutic stages in GIM, and that clients grow while passing through these four stages. The idea of the four stages of therapy is expected to be a useful basic material in establishing more effective GIM therapeutic strategies and more effective intervention for clients. This correlates with attempts to show how GIM is useful in the mental health area.