The aim of this study was to investigate the effectiveness of traditional Cognitive Behavioral Therapy for Insomnia and Internet-based Cognitive Behavioral Therapy for Insomnia on people with insomnia comorbid depression. This study employed pretest-posttest and follow-up quasi-experimental designs that used experimental groups and control group. A convenience sample of 45 university staff and professors who received score higher than the cut-off score in PSQI and BDI-II questionnaire was selected by using diagnostic interview based on the DSM-5 depression and insomnia. 15 people were randomly assigned into three groups. The experimental group received 6 sessions of cognitive behavioral therapy for insomnia. PSQI and BDI-II questionnaire, test was administered three times (before treatment, after the last treatment and one month after treatment). The data were analyzed by means of mixed ANOVA. The results showed traditional cognitive behavioral therapy for Insomnia (CBT-I) and internet-based cognitive behavioral therapy for Insomnia had positive effect on of sleep quality. ICBT-I group and CBT-I group had more reduction in depression score compared to the control group, but CBT-I group indicated more score reduction compared to ICBT-I. Follow-up results showed that the effects were long-lasting.