In current years pervasive computing focuses of IoT markets, Big data, Cognitive computing and analytics, new business models and services, home appliances, and support for wearable and IOT connected devices. In this work, the proposed system focuses several Bayes classifiers are used for final decision making expressed in term of probability of user trustworthiness and also analysis some common issues and then propose a pervasive computing architecture based on a simple but helpful of the Bayes classifiers are more trustable model.