The boron content in three different kinds of bean and their products yubas were determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES) to research the migration of boron during the process of yubas and the relationship of boron content between different beans and yubas. The results showed that the boron contents were detected in all of the three kinds of beans, and the content was between 18～24 mg/kg. The boron contents in yubas were different because of the beans, but the mobilitys of boron were independent of the species of bean, were all between 60%～67%.