A method for estimating QoS parameters based on measurement is presented in this paper. This method does not require the users to establish any models describing the statistics of the traffic and provide model parameters to the network in advance. Instead, network monitors and measures the incoming traffic statistics, and estimates QoS parameters based on the measured statistics, which enable it to overcome the drawbacks of model-based QoS parameters estimation and be convenient for connection admission control and dynamic bandwidth allocation in networks.