The article is devoted to the development of an intelligent system, based on the Arduino hardware and software platform. It is an element of the Smart House, which at the core lays the concept of IoT (Internet of Things). The device is designed for continuous automated monitoring condition of the aquarium, with the ability to remotely inform his owner. Monitoring and support of the life processes is carried by parameters such as feed supply, control of the temperature set, control of illumination. Versatility and modularity of the platform makes it possible to use it for any type of aquarium with the ability to expand functionality by adding the necessary sensors or metrics. The basic stages of designing of the device are described, its characteristics and the results of its work are given.