Method, device, and system for controlling cache

Provided are a cache control method, device and system. The method includes: acquiring a varying address range of a target object; and determining an address variation type according to the varying address range, if it is memory address allocation or release, then determining a cache operation address range corresponding to the varying address range, and controlling the cache to perform cache operation information within the cache operation address range, the cache operation information prohibiting the cache from performing data synchronization within the cache operation address range. The present invention avoids the cache performing unnecessary synchronization work, which significantly improves the processing efficiency of the CPU and reduces the requirements for the bus and memory bandwidth.