The world today witnessed an important transmission to the virtual world across the web. After years of interaction and exchanges between people, the web becomes saturated with enormous quantity of data in various fields. Therefore, the (semi-)automatic applications become necessity to find appropriate information in a brief time. In this context, we propose a new approach of ontology based information correlation from various web resources. As validator of this approach, we introduce the conference organizer system that will be useful during the setting up of a conference. Where we benefit from semantic web technologies to extract, correlate, rank and store information, and consequently propose a ranked lists of experts and social events depending on the user requests.