This study is aimed to understand the lava flow via mineral alignment. First, the samples were obtained from HwaKang lava platform with in-situ orientation measured. Second, the samples are made to oriented thin section. Finally, we analyze the mineral alignment by Image Pro Plus. The preliminary results of this study show that the ration of longitudinal to lateral of plagioclase is greater than 2 which indicate the flow follows the surface. However, the same technique fails to apply to hornblendes perhaps due to lack of hornblende presents.