Stream media synchronization remains to be a challenging task due to the ldquobest-effortrdquo transport network and complicated application. Unpredictable channel behaviors make it rather difficult to fulfill both the synchronization requirements and delay requirements simultaneously. This paper research stream media synchronization solution on low level layer; analyze the un-sync causes in terms of system layer; cite control theory from management engineering; and proposed a composite buffer driven self-adapting stream media synchronization control solution, called CS-CS solution. By use of this self-adapting mechanism, it could match time-varying network and potential delay, so that to improve stream media synchronization, for better audiovisual quality.