To provide a memory management system that reduces memory use and facilitates development.

The memory management system, where a server computer 1 forms a memory space E for storing screen information displayed as webpages and comprises a screen information holding function D for storing and holding shareable screen information shared in a given operation in a Web application out of the screen information stored in the memory space, provides the server computer 1 with a memory management function I for deleting from the memory space the screen information used by the operation out of the screen information stored in the memory space after the operation is switched to another in the Web application.