The invention relates to a memory garbage recycling system and method. The memory garbage recycling system comprises a garbage analysis module and a garbage monitoring module. The garbage analysis module is used for recording memory distribution and releasing information, querying a page table to acquire physical address information so as to determine whether each data object exists in the memory and acquire the physical address space information corresponding to the data objects, updating the information to a data object monitoring list in the garbage monitoring module to determine the physical address space information corresponding to the data objects; the garbage monitoring module is used for maintaining the data object monitoring list, adding the newly distributed data objects into the data object monitoring list, deleting the deleted data objects from the data object monitoring list, monitoring all access requests, correlating the access to the data objects, updating the access information of the data objects, correlating the access requests to the data objects in the data object monitoring list, and updating the access information. The garbage monitoring module regularly feeds the data object access information back to the garbage analysis module, the garbage analysis module is responsible for analyzing the suspicious memory garbage blocks according to the information and determining the real memory garbage blocks in the suspicious memory garbage blocks so as to recycle the memory space at high precision and low cost.