The preset specification provides a method of managing a disaggregated memory in a virtual system. Herein, the disaggregated memory managing method includes: detecting a memory access pattern in a virtual machine node based on an operation of a virtual machine; and performing a memory operation by using a memory block in consideration of the memory access pattern, wherein the memory access pattern is variably set based on a time at which the operation of the virtual machine is performed, and the memory block dynamically changes in size based on the memory access pattern.