Abstract: A method of compressing global positioning system (GPS) data, a method of restoring the GPS data, and a GPS device are provided. The method of compressing GPS data includes receiving, by a GPS device mounted in a moving object, coordinate values related to source data of GPS information at a sampling rate in accordance with a communication environment in which the GPS device communicates with an external device with a predetermined band; allocating a data capacity that matches a maximum value of displacement according to a difference which can occur between coordinate values of the moving object; calculating a displacement value between corresponding coordinate values at each time interval of the sampling rate; and generating displacement data by encoding each displacement value according to the data capacity and storing the displacement data in a predetermined device.