This essay will examine the use of complex variable theory to make the industrial electronics design more appropriate. Complex analysis is a field of mathematics that assists engineers to know more and better about solving complex problems involving electric fields, signal processing and circuit stability. The complicated factors used allow it to be easier to control and analyze AC circuits and control systems resulting in more accurate designs and more efficient operations. Simpler calculations and superiority in estimating the behavior of electronic components in various scenarios are suitable in industrial applications. The paper demonstrates how the techniques of complex variables can be applied in practice to enhance the stability of the system and the ways of the circuits optimization. The findings indicate that inclusion of the complicated variable theory in the electronics designing process is a big difference in the advancement and achievement of industrial electronics.