Data storage method and device

The invention provides a data storage method and device; the data storage method is applied to a server, and comprises the following steps: obtaining grabbed data, and building an index for the grabbed data; storing the grabbed data and the index into a buffer memory; determining whether a backup condition is satisfied, and if yes, storing the grabbed data and index from the buffer memory into a hard disk for backup. The method and device can realize endurance of correlation data for data retrieval basis, thus ensuring effective performance in a data retrieval process.