The topic of this thesis is the realization of an automated smart storage system using the Internet of Things technology. Initially, storage systems and their progress towards smart warehouses were presented. To make it easier to track topic, technologies that lead to advances in storage systems are listed. The development programs used during the process of making the whole smart warehouse system are briefly described. This thesis is based on the simulation of all hardware components of a smart warehouse. The principle of operation of the smart storage system itself is described in detail, which includes product sorting, writing and reading data in RFID tag, product storage and finally product retrieval as well as data management, monitoring and analysis via HMI devices and Node-RED dashboard. Also, the communication between PLC, IoT Gateway and IBM Cloud is described and which all system elements are listed. Because the system is managed via a PLC, a smart warehouse management driver has been developed. Furthermore, connecting the system to the Internet using the Node-RED software tool, Raspberry Pi, and IBM Cloud is described. At the very end, a visualization of the entire system is shown on the HMI device and the Node-RED dashboard located on the cloud. This thesis has shown that the cloud offers far more opportunities in terms of management, data manipulation and visualization compared to the classic system management in industry. The system offers far greater flexibility than conventional solutions, since it is possible to access the system from anywhere via the Internet.