1. A cache structure for implementing reconfigurable system configuration information storage, comprising hierarchical configuration information cache units, an off-chip memory interface module, and a configuration management unit; the hierarchical configuration information cache units are configured to cache configuration information that may be used by one or more reconfigurable arrays within a time period; the off-chip memory interface module is configured to establish communication between the hierarchical configuration information cache units and external memory; the configuration management unit is configured to manage the reconfiguration process of the reconfigurable arrays, comprising: map the subtasks in the algorithm application to a reconfigurable array, and set a prioritizing strategy for the hierarchical configuration information cache units; when a new subtask is mapped to a reconfigurable array, the reconfigurable array will load the corresponding configuration information according to the mapped subtask, and accomplish functional reconfiguration of the reconfigurable array.