This study investigated the effect of music-centered Integrate arts therapy on anxiety disorders for the purpose of decreasing anxiety levels of psychiatric ward patients. The ‘Happy Life’ program can be a Gestalt theory- based psychotherapy, which was developed by the author through this work and which actually includes music- based imagination, improvisation, danceㆍmovement and poetry in it. 26 patients were hospitalized in a psychiatric ward of D medical center, All 26 persons were eventually divided into 2 groups for both experimental and control groups where each group consisted of 13 persons. Each group completed State Trait Anxiety Inventory(STAI) of Spielberger. STAI pre/post-tests were conducted one day before/after every experiment. experiment for hospitalized groups was performed during 90 minutes per one experiment, 2 times per a week, and totally 13 experiments were continued as one session. SAS 8.03 program was used for data analyses of the above experimental results from both experimental and control groups. By theses analyses, pre-tests average and standard deviation were obtained, and ANOVA and ANCOVA were also fulfilled to analyse the difference of therapy conditions accordingly. The results from a covariance analysis showed that the experimental group participated in Gestalt music therapy- “Happy Life” demonstrated more decrease in anxiety levels than those of control group. Therefore, this work suggests that “Happy Life” program has a value for either group or individual treatment in the aspects of decreasing anxiety disorders of clients. Moreover, this program also turned out to be valuable enough for stress relaxation, health care and field therapy education of normal people.