To meet the scheduling demands of dispatching the agricultural machinery to the reasonable farmlands, time-windows based temporal and spatial scheduling model for agricultural machinery resources was built, which serialized decision-making processes and got optimal solutions for each process. The prototype system was developed, which realized functions like data input, model computing, dispatching command generation, center navigation and so on. Cooperating with an agricultural association in Beijing, the system was tested in practice. The experiment results showed that the model could perform well in practice, which improved the management and working efficiency of the agricultural association.