The objectives of Tom Yum Kung & Thai Spice Factory Project are. 1. To study Tom yum kung consumer’s behavior. 2. To study marketing strategies to apply with the established project Tom yum kung & Thai spice Factory restaurant business for more efficiency. 3. To study the trend and the possibility for establishing the new Tom yum kung & Thai spice Factory restaurant business. The population sample group is calculated by customers of 5 chain restaurants for which we consider to account for 50% of the restaurants in the Bangkok Area that have regular customers. The selected restaurants; 1 Baan Ying Restaurant, 2 Greyhound Café, 3 My Café The Library, 4 Coffee Bean by Dao, and 5. Rosniyom restaurant, were each given a set of 77 questionnaires amounting to a total of 385 questionnaires. Sample size was selected using the accidental sampling method calculated from the total number of customer visiting the five restaurants during the month of May 2015. Descriptive Statistic method was used with bivariate analysis to describe frequencies of measured key factors.