This article discusses an approach to building systems based on the knowledge with ability to extend their own domain knowledge through obtaining information in the Internet. In that approach proposed to use infinity loop in which the system automatically learns to find good quality documents within a knowledge area represented in Internet using ontology and expert preferences and on next step extend this ontology by extracting knowledge from retrieved documents. Such approach would let to create a system capable of continuously increase their own knowledge by exploring documents in the Internet and solve problems using current state of the knowledge area.