With the continuous enhancement of functions in Android smart terminals, users' performance requirements for smart devices are increasingly high. The Android operating system, with its openness and customizability, provides users with a wealth of personalized options. However, optimization during the customization process is crucial to ensure smooth system operation and a good user experience. It is aimed to explore the measurement and optimization strategies of performance experience in Android customized systems. The basic concepts and measurement methods of Android system performance experience were analyzed, common performance issues were pointed out such as memory leaks, CPU overload, and I/O blocking, and in conjunction with user experience perception, three key optimization strategies were proposed, including system startup time, application startup time, and smoothness of operation. Through experimental evaluation, the effectiveness of these optimization strategies in improving system performance was verified. The research results show that through systematic performance optimization, the performance of Android customized systems can be significantly enhanced, thereby strengthening the user experience.