A location information obtaining method applied to a communications system including at least a network device, a user equipment and a first user equipment, comprising: Obtaining, by the network device, location information of a reference point, location information of the first user equipment and location information of the user equipment; Separately determining, by the network device, relative location information of the first user equipment relative to the reference point and relative location information of the user equipment relative to the reference point, wherein each relative location information comprises: a granularity of relative longitude location information and a transmission value of the relative longitude location information, a granularity of relative latitude location information and a transmission value of the relative latitude location information, and a granularity of relative altitude location information and a transmission value of the relative altitude location information; wherein the relative longitude location information is equal to a product of the granularity of the relative longitude location information and the transmission value of the relative longitude location information; the relative latitude location information is equal to a product of the granularity of the relative latitude location information and the transmission value of the relative latitude location information; and the relative altitude location information is equal to a product of the granularity of the relative altitude location information and the transmission value of the relative altitude location information; and sending, by the network device, the location information of the reference point, the relative location information of the first user equipment relative to the reference point and the relative location information of the user equipment relative to the reference point. Obtaining, by the network device, location information of a reference point, location information of the first user equipment and location information of the user equipment; Separately determining, by the network device, relative location information of the first user equipment relative to the reference point and relative location information of the user equipment relative to the reference point, wherein each relative location information comprises: a granularity of relative longitude location information and a transmission value of the relative longitude location information, a granularity of relative latitude location information and a transmission value of the relative latitude location information, and a granularity of relative altitude location information and a transmission value of the relative altitude location information; wherein the relative longitude location information is equal to a product of the granularity of the relative longitude location information and the transmission value of the relative longitude location information; the relative latitude location information is equal to a product of the granularity of the relative latitude location information and the transmission value of the relative latitude location information; and the relative altitude location information is equal to a product of the granularity of the relative altitude location information and the transmission value of the relative altitude location information; and sending, by the network device, the location information of the reference point, the relative location information of the first user equipment relative to the reference point and the relative location information of the user equipment relative to the reference point.