This bachelor thesis describes the design of an automatic door opening system for livestock (hens) and remote control using a mobile application. Document includes description of the control unit - Arduino development board, different ways of wiring components, possibilities of an automatic door opening system, a selection of appropriate components and design of construction of the automatic door opening system. In this work describes creation of the system including a functional model and mobile application development with demonstration of available functions for remote control of the automatic door opening system. The thesis contains an economic conclusion and a comparison with current market opportunities, including an overview of competing products and their market share.