The disclosure discloses a method for Policy and Charging Control (PCC) based on a time period, which comprises: when a Policy and Charging Rule Function (PCRF) entity provides Quality of Service (QoS) rules to a Bearer Binding and Event Reporting Function (BBERF) entity, a time indication of activation and/or deactivation of the QoS rules is provided at the same time. The disclosure also discloses a system for PCC based on a time period, which comprises: a providing unit located in the PCRF entity and configured to provide QoS rules and a time indication of activation and/or deactivation of the QoS rules to the BBERF entity at the same time. The disclosure ensures the consistency between the time of activating the QoS rules by the BBERF entity and the time of activating the PCC rules by the Policy and Control Enforcement Function (PCEF) entity, and the technical scheme is simple and practical.