Abstract: In this paper the trends in the study on the coherent structure of turbulent shear flows are discussed with a brief review of the achievements in this area during the last thirty years. It is shown that the accurate database of turbulent fluctuations plays a significant role in the quantitative investigation of the structure patterns. It is emphasized that the study on the dynamics of the coherent structures is the main target today. Some comments are made on the present views of the dynamics, e.g., flow in...