In accordance with the problem that current static SLA can not meet the increasingly common user realtime service request

this paper build a new model based on dynamic SLA and improve its limitations.Applied to Guangxi mobile operation support system

the model better solve the parameter mapping problem between business-layer SLA and system-layer process and device.Finally

on the basis of the improved model

this paper establishes a prototype system

which can adaptively adjust the businesslayer SLA parameters to real-time response to online requests of users for the mobile services.In the case of limited system resources

the prototype system can best meet the online requests of mobile users

and provide corresponding service quality assurance for the different business requests.