The present disclosure provides a directional-traffic statistics collection method, device, and system. A service packet of user equipment is parsed, and whether a feature field in the service packet is valid is determined, to determine whether to report, to a charging server that is configured to perform directional-traffic-based charging on a service provider, an amount of traffic used in a process in which the user equipment uses a service provided by the service provider. According to the solutions in embodiments of the present disclosure, a fraud risk such as fraudulently using a packet feature can be avoided, and accuracy of performing directional-traffic statistics collection on a service provider can be improved.