The dynamic responses of structures, such as natural frequency, damping, and mode shape, are typically calculated using observation data from accelerometers. However, long-period (low-frequency) static responses cannot be accurately derived due to the instability caused by accumulated errors during the double time integration process of acceleration data to obtain displacement. On the other hand, GNSS technology, which simultaneously receives multi-constellation and multi-frequency satellite signals, can provide real-time and high-resolution displacement information through Real-time Kinematic (RTK) positioning. This technology offers second-level temporal resolution and centimeter-level spatial resolution, delivering real-time, stable, and absolute displacement data. Moreover, with three or more GNSS units, it is possible to calculate additional parameters such as tilt and torsion. This study plans to install four GNSS observation systems on the upper floors of TAIPEI 101. These will be integrated with the existing seismic observation systems installed on three floors by the Institute of Earth Sciences, Academia Sinica. This setup will enable safety assessments of TAIPEI 101 following earthquakes and wind events, support the development of building health monitoring technologies, and provide a testing platform for GNSS instruments and techniques.