Objectives: The present study is a culture-building practice and aims to investigate the effects of optimized usage of internet (social networks) and to avoid its damaging aspects among students of university of applied science and technology in Qazvin.Method: The present study, in terms of goal is applied and in terms of collecting information style, is survey-descriptive. The population under study is undergraduate students in the academic year 2014-2015 from which about 250 people were selected according to Morgan and Kerjcie sample size table using cluster sampling method. For data collection, a five point Likert scale questionnaire containing 25 components with the reliability equal to 0.81 according to Cronbach's alpha was used. In addition to descriptive statistics for data analysis, inferential test, ANOVA and multiple regressions were used.Results: The results of the multiple correlation coefficients showed that addiction to virtual networks, physical and psychological damage, moral deviation, academic failure, positive attitude to virtual networks and false identity respectively have the highest impact on the use of virtual networks.Conclusion: Social networks have got great importance because of the rapid growth of members and influencing the society, therefore, to reduce damages students should receive educational and cultural instructions on a large scale.