The importance of internet and other media means has been increasing day by day as an important media mean. Moreover, it offers many benefits to its users .The advanced in technology in the field of the communication through the internet helped in the appearance of the social media. As short time passes, social media websites have been developed and increased and they played a great and main role in everyone's life especially for university teenagers from around the world including the Egyptian teenager's universities. Social media websites have become of great importance in our lives to the extent that they affect the values of our teenagers whether positively or negatively. This study aims to analyze the impact of using social media websites on system value for the Egyptian youth. It also aims to analyze the impact of using social media websites on the family relations and on the religious values for the Egyptian youth. And here the research problem appeared to identify the effect of social media websites on value system for university teenagers in Egypt. This study is considered from the descriptive studies that aimed to reach adequate and detailed knowledge about the elements and the phenomenon of the problem in order to have a better and an adequate understanding to it and to put its future policies and procedures. The descriptive correlated approach is used by applying the sampling method as a mean for data collection to measure the effect of using social media websites (facebook, whatsapp, messenger, twitter, Instagram) on the value system. This study also measures the negativity and the values that the usage of social media websites help in spreading; by applying on a sample from the Egyptian university's teenagers either on private or public sector. This study depended on collecting data from a purposive sample and the questionnaire has been distributed among the teenagers that use the social media websites. The primary data has been collected from Egyptian university students represented in 400 students from public universities and 200 students from private universities. This study has reached the following results: Social media websites led to the formation of a gap between youth and their families as they cause many problems inside the family. They led to the youth neglecting of the religious rituals like pray delay and weakening of the religious identify, it also did not promote national unity. They also led to the isolation and the increase of the difference that led to the intellectual confusion and the difference in youth's opinions. They led to the existence of fake (unreal) friendships. It helped increasing the teenagers' attention towards knowing the updated information about Egypt continuously, it also led to expressing different opinions freely. Social media websites led to the waste of time, the spreading of rumors, the changing of facts, the increasing use of swearing and cursing words in the expressions among youth. This study suggested some recommendations: To build Egyptian social media networks to strengthen the communication among the Egyptian youth and to spread the principles of citizenship and the homeland affiliation. It also recommends putting strict control to follow what's published through these networks and websites to protect our children from what's transmitted through them from destructive opinions, sex photos, and illegal relations that don't suit our traditions and values. But this doesn't mean to control the freedom of expression through these websites.