The invention discloses a method and a device for estimating a mobility state of user equipment (UE). The method comprises the following steps that the UE receives prompting information of a tracking cell; and the UE estimates the mobility state according to the prompting information of the tracking cell. Due to the adoption of the method and the device, the inaccuracy for estimating the mobility state of the UE can be solved, and the mobility robustness problem can be reduced.