this research used areas sampling dividing bangkok metropolitan into 50 areas (appendix 1) and interviewing respondents at supermarkets located in those areas a survey was conducted by issuing with 625 self- administered questionnaires randomly 5645834 bangkok ians a summary of respondents' characteristic is presented in table 1 the obtained data are analyzed with the mean of likert's scale of 5 points standard deviation frequency and percentage and regression method is used for analyzing store preference