A caching control device that controls caching of data stored in a storage device, includes a storing unit that stores information concerning memory allocated to the storage device as its cache memory, where the storing unit is installed in a first computer connected to a second computer via a network, and the second computer manages reading and writing of data to the storage device; and a controller that controls the caching of the data that uses a memory installed in the first computer as cache memory, based on the information stored in the storing unit.