This study is an integrative review of efficacy studies on teletherapy which has risen since the beginning of the COVID-19 pandemic as a sole option for people in need of health psychological service. We searched domestic research articles over the past 3 years according to the integrative review procedure and selected the final 16 papers. The results of this study are as follows. First, the types of teletherapy used were listed in the order of frequency of use: mobile application, virtual reality therapy, video counseling and internet website-based treatment. Analyses revealed that virtual reality therapy showed high effect sizes in public speaking anxiety, social anxiety and state anxiety. In addition, mobile application therapy showed high effect sizes in cognitive emotion regulation, trait anxiety and depression. Second, research on teletherapy utilizing virtual reality and mobile applications has increased dramatically. Third, there is an increasing trend of research involving self-treatment. Based on the findings of this study, current issues on teletherapy and orientation for further research are discussed.