The studies of avoidance learning (J. Garcia, et al), the effect of mere exposure (P. Pliner) and children's food preference (L.L.Birch, et al) were introduced, and based on the results of our experiments, the subject of food preference was discussed.<BR>Our conclusion is summarized as follows.(1) The determinants of food preference are closely related to the familiarity of the flavor, the taste and the appearance of the dish. When they are unfamiliar, they will arouse the feeling of uneasiness, and we will take dislike to that food.(2) The pleasant experience at mealtime will promote the liking to the food.