A memory access monitoring method and a memory access monitoring method device are disclosed, The method comprises: performing coarse grain monitoring on local memory pages, if a hot page with coarse grain monitoring exists in the local memory pages, requesting an operating system to perform an optimized migration for the content of the hot page, and if a half hot page with coarse grain monitoring exists in the local memory pages, initiating fine grain monitoring to the half hot page; and performing fine grain monitoring on the half hot page, if a hot area with fine grain monitoring exists in the half hot page, requesting the operating system to perform an optimized migration for the content of the hot area.