The development of mobile application is popular, but the stability of mobile applications is dependent upon the memory usages. Web browser of real time operating system uses the memory only allocated in the start-up operation and the memory may be additionally requested by pages. This paper proposes (1) a memory allocation structure to effectively maintain the memory resource, and (2) a memory exhaustion avoidance structure to prevent additional requests of memory that hampers system stability. The conducted experiment shows that our methodology supports the image display in a fragmented condition and decreases the additional requests for memory.