The accumulation of nutrition and energy is an important factor for the migration of migratory birds. To understand how greylag geese obtain energy to meet the physiological demands of fall migration, we studied the movement, home range and habitat use of graylag geese by using satellite tracking from August to October 2015 in the Tumuji wetland of Inner Mongolia. The enhanced vegetation index (EVI) was used to analyze habitat use, the sizes of the day and night home ranges were determined using kernel density estimation (KDE), and the average activity distances in different months were analyzed. The EVI of the locations of the greylag geese decreased from August to October, the geese gradually dispersed southward and concentrated around the area with abundant water, and they preferred the lakes to the grassland. The home range size of the geese increased from August to October and the home range size was larger in daytime than at night. The movement distances of greylag geese were higher during the day, especially for the peak of movement before dawn and at dusk. Because the temperature decreased gradually from August to October, the potential food resources in grassland declined, and greylag geese tended to occupy the areas with more abundant water, which gradually increased both the home range size and the movement distances, thus enabling the geese to efficiently obtain sufficient nutrition and energy to meet the physiological demand of fall migration.