Inductosyn is often used as the angular displacement measuring sensor to three-degree-freedom simulating turntable in the field of inertial navigation. Based on resolver-digital converter and digital signal processor this article digitizes inductosyn. Meanwhile the inductosyn is taken as an intelligent node applied to a communication network with motor servo system which belongs to three-degree-freedom simulating turntable. As a result, the transmission distance and quality of the angular displacement signal is greatly improved, the actual angle measurement accuracy achieves 5 ", and dynamic tracking performance is good.