Embodiments of this application provide a service processing method, a device, and a system, and relate to the communication field, to perform more refined service management on a terminal device. The method specifically includes: A first network element sends a first message to a second network element, where the first message is used to request to obtain location information of a terminal device; the first network element obtains the location information from the second network element; the first network element determines, based on the location information, whether the terminal device is located in a first non-restricted area; and the first network element allows the terminal device to obtain a service if the terminal device is located in the first non-restricted area; or the first network element disallows the terminal device to obtain a service if the terminal device is not located in the first non-restricted area. This application is used for service processing.