The anthocyanins and flavonoids ingredients in blueberry extracts from different manufacturers were analyzed under TOF/MS full scan mode and Q-TOF/MS fragment scan mode simultaneously using ultra-performance liquid chromatography/time-of-flight mass spectrometry. First of all,based on the molecular formula calculated by accurate mass,the possible compounds were found in the ‘lists of potential compounds',then these compounds were qualitatively analyzed according to the fragmentation characteristics of MS2. ...