Objectives : The aim of this study was to investigate the value and efficacy of BDI, STAI, STAXI, ISI, and SCL-90-R in correlation with depression, anxiety, and insomnia patients. Methods : A total of 39 patients, who were diagnosed with depression, anxiety, and insomnia were evaluated using BDI, STAI, STAXI, ISI, and SCL-90-R. They were then statistically analyzed. Results : 1. BDI scores of depression patients were significantly different from other patients. 2. BDI scores of depression patients had strong positive correlation with STAI-S, and STAI-T scores. 3. STAI-S scores of anxiety patients had positive correlation with BDI, and ISI scores. 4. SCL-90-R depression subscale scores of depression patients had strong positive correlation with somatization, obsessive compulsive, interpersonal sensitivity, anxiety, hostility, phobic anxiety, paranoid ideation, psychoticism, global severity index, and positive symptom total subscale scores. 5. SCL-90-R anxiety subscale scores of anxiety patients had strong positive correlation with somatization, obsessive compulsive, depression, phobic anxiety, and global severity index subscale scores. Phobic anxiety subscale scores had strong positive correlation with anxiety, global severity index, and positive symptom total subscale scores. Conclusions : The result findings are expected to serve as a useful resource in future stress-related depression, anxiety, and insomnia case reports and clinical research in oriental neuropsychiatry.