An apparatus for converting an image format of data and a method thereof is disclosed. An apparatus for converting an image format of data comprises an image converter (126) for converting parameters of the image format, an encoder (127) for encoding the format changed data and a file system converter (128) for changing the encodes data into a file system supported by an external interface (121). Also, a method for converting an image format of data comprises converting the image format of data into another image format, encoding the format changed data into a compressed data, and converting data into a file system which an external interface supports.