The relevance of the study is due to the emergence of new Internet-addictive strategies of behavior among adolescents. The use of existing of psychodiagnostic of methods on revealing behavioral addictions children and adolescents from the virtual space does not give valid results. This leads to uncontrolled development in the teenage years mechanism of pathological addictive behavior on the basis of which can then easily be navigated to chemical addictions (smoking, alcoholism, drug addiction). Despite the seemingly harmlessness of internet addiction, they became the first step in the addiction personality and pose a threat to state security. The purpose of this article is to explore the possibilities of psychodiagnostics Internet-addictive behavior among pupils, as well as the need to update pedagogical prevention of addictive behavior in the educational environment. The leading method of the research is the analysis of psycho-pedagogical literature and legal acts in the field of prevention of addictive behavior, psychodiagnostic methods. In the article, there is an attempt to justify the need for increasing a conceptual model of coping prevention for all types of addictive behavior. It is shown that at the stage of pedagogical prevention it does not make sense to develop various programs of prevention of drug using, nicotine, smoking blends, alcohol, gaming and Internet addictions. The single purpose of preventive educational activities is the formation of adaptive coping strategies and coping resources of adolescents and young people that are at the heart of personality’s resilience. Results of the study showed that the method for the diagnosis of Internet addiction does not detect those adolescents who already have symptoms of adaptation disorder. They were discovered by us on the basis of a study of strategies of coping behavior of pupils.