Intelligent search engine based on AI technology and Big Data processing. Intelligent search system reduces the cost of daily searching for information in diverse sources and offers business users accurate and detailed answers to complex questions related to production processes, service delivery and applied research. A search system based on machine learning and Natural Language Processing technologies is capable for processing large amounts of data and making accumulated knowledge available to company employees. Regardless of where the particular information is located, the user gets convenient access to it using the search interface: query input lines, search results output pages and filters.