A method for creating/storing a file that facilitates search of data stored in a storage medium, and a data search method using the same are disclosed. The file creating method creates a rack of virtual RAM (RAM) file that is divided into several units according to divisional units for individual divisional units, and a record allocation table (RAT) file that stores a record position of each divisional unit of the RVR file. As a result, a database (DB) of large-volume irregular data can be easily created, and data analysis can be quickly achieved.