In the last years, demand for high-speed internet access and multimedia service has increased greatly. The IEEE 802.16 Working Group on Broadband Wireless Access is developing the IEEE 802.16 standards for Wireless Metropolitan Area Networks. IEEE 802.16 aims at providing broadband wireless last-mile access in a Metropolitan Area Network, easy deployment, high speed data rate and large spanning area. WiMAX also support quality of service architecture include priority scheduling and queuing for bandwidth allocation to support our system more efficient. Therefore, we have an idea to implement some scheduling schemes on WiMAX system in NS2 to analysis in uplink and downlink direction to get better performance. By simulation results, it can show the performance of different scheduling schemes clearly, and which one suit for different specific environment. Finally, we can support an efficient Queuing scheduling theory on dynamic bandwidth allocation to get better performance for the IEEE 802.16 system.