The four-rotor unmanned aerial vehicle (UAV), known as quadrotor UAV, has been a hot area for the research of unmanned aerial vehicles. Ground Control Station (GCS), as an essential part of quadrotor UAV system, plays a very important role in applications of quadrotor UAV. Most ordinary GCS are stand alone ones, and lack extending abilities. Considering this defect and the real requirements of monitoring and control of UAV, this paper provides a new GCS based on VC++ and Java programming techniques. The major novelty of this GCS is of the Web access to real-time flight data. Plus, the proposed GCS posses the standard functions, such as data receiving in real time, storing the data and displaying the data. Experiment results are provided to show that the GCS operates well, with good human-machine interaction and extending abilities.