This paper deals with artificial intelligence and its application today. In the world of big data and the flood of information systems using artificial intelligence are becoming increasingly important. At the end of the twentieth century a bottom-up approach to the development of artificial intelligence started new directions in research. They were marked by a significant increase in investment in the development of intelligent systems, which continues today. The paper describes various methods achieved in field of artificial intelligence. Those methods include expert systems, machine learning, artificial neural networks, evolutionary computing, and the concept of an intelligent agent. Given are examples of systems based on artificial intelligence such as a virtual assistant, customers recommendation system, self-driving car. Particularly emphasized is Google, the largest commercial system of artificial intelligence ever built. Described are current research projects in artificial intelligence which are using computer architecture inspired by the brain. There is also expectation of wide usage of artificial intelligence in the personalized smart homes by linking objects in the "internet of things". In the end it is stated that the final goal, the creation of machines that thin, has not yet been reached. Yet today, these efforts do not cause laughs, but the concern about aftermath of humanity if we reach that goal. Boost for concern is the possibility of the development of general artificial intelligence in the decades that follow.