1. A file system for searching for a file, the file system comprising: a conversion unit for converting a name of a target file into memory block information about a specific memory block; a storage unit including a plurality of memory blocks, which contains a memory block corresponding to the memory block information, and at least one memory block storing data corresponding to the target file; a data management unit for selecting the memory block corresponding to the memory block information, and when a selected memory block has stored detailed information about the target file and memory block information about the at least one memory block having stored the data corresponding to the target file, reading the data corresponding to the target file from the at least one memory block having stored the data; and an output unit for outputting the read data, wherein, when the selected memory block has stored detailed information about a specific file and memory block information about at least one memory block having stored data corresponding to the specific file, the data management unit extracts a name of the specific file from the detailed information about the specific file, and compares an extracted file name with the name of the target file, thereby determining if the selected memory block corresponds to a memory block containing information about the target file.