In a VoD(Video-on-Demand system), admission control that is used to serve multimedia data efficiently has to be performed by an accurate grasp of the condition of surplus resources. Most of all, we need to adaptable admission control mechanism because the disk has irregular response time caused by external elements of disk, and also has high deviation of amount demanded. In this measurementbased statistical admission control scheme, as we suggested in this research, we can get both maximum resource utilization and QoS guarantee through 2 processes of off-line process and on-line process. On performance evaluations, we shows that the video server can utilize maximum resource utilization with QoS guarantee through the precision of performance by measurement and adaptable admission control according to the requested bandwidth. Keywords : Admission Control, VoD, Disk Bandwidth Measurement