Abstract: The three-dimensional displacement measurement sensor based on the double mutual-inductance equivalent voltage method designed by this paper is an effective device for reflecting the deep displacement of potential landslide hazards. However, observing its measurement parameters cannot intuitively understand the underground soil displacement. To solve this problem, the concept of digital twins was introduced, and a sensor digital twin state monitoring software system was designed and implemented. This system included key technologies such as real-time data exchange, physical motion state calculation, and three-dimensional visualization world construction. The system, in conjunction with the sensor, could be applied to displacement monitoring in geological and environmental disasters, providing good decision support for risk assessment and prevention of geological hazard engineering.