A method for controlling network transmission delay, a QoS control entity, and a communication device are disclosed. In the method for controlling network transmission delay, the QoS control entity, and the communication device in the embodiments of the present invention, a service flow delay threshold is set to monitor the network transmission delay, and, when it is determined that the service flow transmission delay requirement is not met, a delay control policy is formulated to adjust the network transmission delay dynamically, thereby improving user experience.