Data storage method of flash memory card in video monitoring equipment, and system thereof

The invention relates to video monitoring, and discloses a data storage method of a flash memory card in video monitoring equipment, and a system thereof. With the method, the space utilization rate of the flash memory card is high, video data access efficiency is high, and the stability when files are frequently read and written is high. According to the invention, a storage file comprising an integral number of storage blocks and an index file comprising an index head and index entries are configured in the flash memory card, wherein the size of the file is invariable; the storage blocks are corresponded to the index entries on to one; the index head comprises a read indicator and a write indicator. The method comprises the steps that: according to the index entries, data is circularly written into a current storage block, or a current storage block is covered by the data; according to the information of the current storage block, the index head and the corresponding index entry information are updated.