This study aimed to bring out the mathematical principles and regularities of Hangeul through its cyclical order and variable form. A Hangeul structure comprised of two primary characters (‘ㄱ’, ‘ㅇ’) – rather than the one of the existing standards comprised of eight primary characters (five consonants and three vowels) – was created based on the formative similarity between phonemes. The stroke divisions and the differing lengths of the characters demonstrate how Hangeul is not a static writing system but rather undergoes constant creation and extinction.