The present invention relates to a memory management system and method for open platform. The memory management system and method of the present invention utilizes the main spirit of sharing service in open platform. When the used memory in local open platform exceeds an upper limit, the standard service bundle access interface is used for accessing the standard service bundle in remote open platform. Therefore, the standard service bundle in local open platform can be off-loaded to release the memory space so as to resolve the memory shortage problem. The stability of the whole system can be maintained.