Stirring is necessary when culturing photosynthetic microorganisms. In this study, we focused on TVF stirring which enables uniform stirring with low shear, and cultured experiment was conducted. There are few studies focusing on algal body behavior in the Taylor vortex. In this study, we focused on the algal body behavior in the Taylor vortex and measured the influence of photosynthetic microorganisms on Taylor vortex using UVP. In order to confirm the possibility of ultrasonic measurement for Spirulina, comparison with nylon particles. As a result, the Spirulina follows the flow and has a periodic vibration component.