Study aim: Determining and comparing the effectiveness of cognitive therapy based on mindfulness and therapy based on reducing anxiety, depression and Internet addiction in adolescents with Internet addiction. Design: parallel- randomized blined Settings and conduct: The place is in Tuysarkan city. Educational classes in one of the schools of this city. and conducted by a trained instructor with the permission of the school principal. Some sessions are held in the summer and some in the fall. The students who participate in the research do not know about the effect of the interventions on the desired variables. Participants/Inclusion and exclusion criteria: Be a first high school student. Young's internet addiction test score is 50 or higher. Their state anxiety test score should be 43 or above and their trait anxiety score should be above 46. Their depression scale score is above 77. Do not use other psychotherapy services at the same time as participating in the research. They are interested in participating in the research and declare it with a written consent. Intervention groups: mindfulness-based cognitive therapy group and acceptance and commitment therapy Main outcome variables: anxiety- depression-internet addiction