The objectives of this study were : 1) to find research trends on lifestyles 2) to analyze the lifestyle patterns of middle class residents in Seoul and 3) to develop a standarized instrument to measure lifestyles. Questionnaires were administered to 1615 homemakers in Seoul, The statistics with the SPSS software package was used for factor analysis. The major findings were as follows: the lifestyles of middle class residents in Seoul were categorized into six patterns : Fashion oriented Interior Design Oriented Economy Concerned Simplicity in Eating Hobby Oriented and Health Concerned. A standarized instrument using validity and reliability testes for lifestyles was developed.