Abstract
This report discusses a bridge between system identification theory and its practical use. In order to apply system identification theory to real plants more easily, it is necessary to produce a hardware of the theory. As a prototype of the hardware, a system identification device, which consists of an AD/DA converter and a personal computer, is produced. Graphical User Interface of the device is programmed based on System Identification ToolBox of MATLAB. In this report, the functions of the device is presented.