With more and more applications are developed by Web services, the importance of QoS for Web services combination are becoming increasingly. According to the problems about process of developing Web services and QoS global optimization of Web services composition, the paper design and implement a QoS-based Web service combination framework which supports the visualization modeling and the process of dynamic Web service selection. The paper introduces the overall structure and operating mechanism of the framework, and focus on the implementation of the Web services publish module, process design module. An improved QoS global optimization algorithm, including the methods and characteristics of the realization are introduced in the paper. Finally, a simple Prototype system is also presented.