Abstarct: In this research, the monitoring and investigation of structural health in a non-destructive way by using Lamb waves and the use of peripheral electronic circuits and components (amplifier and power amplifier, AD8302 module, etc.) has been done, which is an optimal way to obtain information about damages and defects. (corrosion and cracks) in the structure and its effect on its performance. The main purpose of monitoring is to reveal structural defects and unusual behaviors that indicate unfavorable conditions in the structure. The data obtained from the health monitoring of the structure are used to check the health and optimize the performance, maintenance, repair or even replacement of the structure. In this study, by analyzing the propagation of Lamb waves and return waves in a frequency spectrum, he diagnosed damage and defects in aluminum structures, so that by comparing the change in the behavior of return waves (amplitude and phase) in a healthy and damaged aluminum plate and comparing it, damage and defects Characterized. The difference between the upcoming research and other researches in this field is that first, the healthy structure is considered as the transformation function g_1 (s) and the defective structure as the transformation function g_2 (s) and by applying the sinusoidal signal x(t) In a frequency range of 40 kHz to 200 kHz, apply to the inputs g_2 (s) and g_1 (s) and save the output y(t) of both systems at each frequency and considering the topics and basics of the system and its identification and Using Fourier analysis, two systems g_2 (s) and g_1 (s) are identified and their changes and differences are measured. We set the transformation function of the healthy structure g_1 (s) as the baxse transformation function and compare the transformation functions extracted in the next stages of the structure health monitoring with it. Therefore, according to the above explanations, structural health monitoring is done by identifying the transformation function at each stage, and due to the use of basic wave concepts, system identification, and the use of peripheral circuits, especially the AD8302 module, the amount of calculations and analysis is reduced, and it can be considered as an innovation in the method. Non-destructive monitoring of structural health. .