The internet of things(IoT) and social networks is an important role of the internet of the future and used emerging techniques consist of heterogeneous communicating devices. In early stages, Many people used internet for access the web page, multimedia services and using social networking web sites. But the next decade, the internet will be connected physical devices and explore new way of working, interacting, entertainment and living. In this Paper, Firstly, we have discussed about history of IoT and its applications; secondly, a literature review of current state-of-art IoT. Finally, we present a survey of emerging technologies and research challenges on Social networks for Internet-of-Things.