Solid-Liquid two-phase flows are frequently encountered in both industrial and global environmental fields such as chemical engineering, mechanical engineering, civil engineering, drift ice, icebergs and so on. Importance of the flows is growing in the above both fields. Measuring velocities of dispersed solid phase is essential for deep understanding of the flows. In this report, first, summary of measuring methods of the velocities is described.Second, simple and easy methods, namely probe method, and visualization of the flow fields and digital image processing, are discussed.